langflow-mcp-server

What changed

Changed 2026-10-29 12:58 UTC

2 descriptions rewritten, 1 schema or annotation change with the description left byte-identical.

--- pinned/add_authz_team_member
+++ observed/add_authz_team_member
  {
    "description": "Add a user to an authorization team.",
    "inputSchema": {
-         "description": "Membership source: manual or sso",
+         "description": "Manual membership only; directory-managed memberships cannot be created here",
+         "enum": [
+           "manual"
+         ],
          "type": "string"
        },
        "team_id": {

--- pinned/replace_policy_bundle
+++ observed/replace_policy_bundle
  {
-   "description": "Atomically replace the provider-and-catalog policy bundle using an expected revision (Langflow 1.12.x).",
+   "description": "Atomically replace the complete provider, catalog, model and integration policy bundle using an expected revision (Langflow 1.13). Read the current bundle and supply every list; empty lists explicitly clear that policy.",
    "inputSchema": {
      "properties": {
+       "approved_integration_provider_ids": {
+         "items": {
+           "type": "string"
+         },
+         "type": "array"
+       },
        "approved_provider_ids": {
          "items": {
            "type": "string"
+       "blocked_integration_action_keys": {
+         "description": "Action policy keys from loaded integration capabilities, in integrations.<provider_id>.<action> format",
+         "items": {
+           "type": "string"
+         },
+         "type": "array"
+       },
        "blocked_model_keys": {
          "items": {
            "type": "string"
-       "blocked_template_keys"
+       "blocked_template_keys",
+       "blocked_model_keys",
+       "approved_integration_provider_ids",
+       "blocked_integration_action_keys"
      ],
      "type": "object"
    },

--- pinned/reset_user_password
+++ observed/reset_user_password
  {
-   "description": "Reset password for a specific user. Admin-only endpoint. Requires user ID and new password (minimum 8 characters). Returns updated user object.",
+   "description": "Unsupported with API-key authentication in Langflow 1.13. This tool returns interactive_login_required without sending the password. Sign in to Langflow interactively to change your password.",
    "inputSchema": {
      "properties": {
        "new_password": {

Changed 2026-10-18 10:58 UTC

6 descriptions rewritten.

--- pinned/get_monitor_message
+++ observed/get_monitor_message
  {
-   "description": "Get detailed information about a specific message by ID. Retrieves complete message data including sender, content, timestamp, and metadata. Useful for inspecting individual message details and debugging message-related issues.",
+   "description": "Find a message by ID by scanning history in windows of 200 within the configured request timeout (default: 30 seconds). A timeout is reported if the lookup budget expires. For large histories, use get_monitor_messages with flow or session filters and offset paging.",
    "inputSchema": {
      "properties": {
        "message_id": {

--- pinned/get_monitor_messages
+++ observed/get_monitor_messages
  {
-   "description": "Query chat/message history with flexible filtering options. Retrieve messages filtered by flow ID, session, sender, or sender name. Supports custom ordering for chronological or reverse-chronological message retrieval. Essential for debugging chat flows, analyzing conversation patterns, and monitoring user interactions.",
+   "description": "Query a window of chat messages filtered by flow, session, sender, or sender name. Langflow selects the newest 100 by default (maximum 200; limit 0 uses the default). Use offset to page into older history; order and order_by sort within the selected window.",
    "inputSchema": {
      "properties": {
        "flow_id": {
+       "limit": {
+         "description": "Window size; omitted or 0 uses 100, upstream clamps values above 200",
+         "minimum": 0,
+         "type": "integer"
+       },
+       "offset": {
+         "description": "Messages to skip from newest history (default: 0)",
+         "minimum": 0,
+         "type": "integer"
+       },
+       "order": {
+         "description": "Display order within the selected window (default: ASC)",
+         "enum": [
+           "ASC",
+           "DESC"
+         ],
+         "type": "string"
+       },
        "order_by": {
          "description": "Optional field to order results by (default: timestamp)",
          "type": "string"

--- pinned/get_monitor_session_messages
+++ observed/get_monitor_session_messages
  {
-   "description": "Get all messages for a specific session ID. Retrieves complete conversation history for a session in chronological order. Essential for reviewing full conversation context, debugging session-specific issues, and analyzing user interactions within a session.",
+   "description": "Get a window of messages for a session. Langflow selects the newest 100 by default (maximum 200; limit 0 uses the default), displayed in timestamp ASC order unless order is supplied. Use offset to page into older history.",
    "inputSchema": {
      "properties": {
+       "limit": {
+         "description": "Window size; omitted or 0 uses 100, upstream clamps values above 200",
+         "minimum": 0,
+         "type": "integer"
+       },
+       "offset": {
+         "description": "Messages to skip from newest session history (default: 0)",
+         "minimum": 0,
+         "type": "integer"
+       },
+       "order": {
+         "description": "Display order within the selected window (default: ASC)",
+         "enum": [
+           "ASC",
+           "DESC"
+         ],
+         "type": "string"
+       },
        "session_id": {
          "description": "Session ID to retrieve messages for",
          "type": "string"

--- pinned/get_monitor_sessions
+++ observed/get_monitor_sessions
  {
-   "description": "List all chat session IDs, optionally filtered by flow. Returns array of session identifiers that can be used to query session-specific messages. Essential for discovering active sessions, monitoring concurrent users, and analyzing session patterns.",
+   "description": "List the newest chat session IDs, optionally filtered by flow. Langflow returns 100 by default, at most 200; limit 0 uses the default. Sessions are ordered by latest message timestamp descending. Older sessions beyond the cap are not returned.",
    "inputSchema": {
      "properties": {
        "flow_id": {
+       },
+       "limit": {
+         "description": "Session limit; omitted or 0 uses 100, upstream clamps values above 200",
+         "minimum": 0,
+         "type": "integer"
        }
      },
      "type": "object"

--- pinned/get_shared_messages
+++ observed/get_shared_messages
  {
-   "description": "Get shared (playground) messages for a source flow, optionally filtered by session and ordered.",
+   "description": "Get a window of shared (playground) messages for a source flow, optionally filtered by session. Langflow selects the newest 100 by default (maximum 200; limit 0 uses the default). Use offset to page into older history; order and order_by sort within the selected window.",
    "inputSchema": {
      "properties": {
+       "limit": {
+         "description": "Window size; omitted or 0 uses 100, upstream clamps values above 200",
+         "minimum": 0,
+         "type": "integer"
+       },
+       "offset": {
+         "description": "Messages to skip from newest history (default: 0)",
+         "minimum": 0,
+         "type": "integer"
+       },
+       "order": {
+         "description": "Display order within the selected window (default: ASC)",
+         "enum": [
+           "ASC",
+           "DESC"
+         ],
+         "type": "string"
+       },
        "order_by": {
          "description": "Optional order-by field",
          "type": "string"

--- pinned/get_shared_sessions
+++ observed/get_shared_sessions
  {
-   "description": "Get the list of shared session IDs for a source flow.",
+   "description": "List the newest shared session IDs for a source flow, ordered by latest message timestamp descending. Langflow returns 100 by default, at most 200; limit 0 uses the default. Older sessions beyond the cap are not returned.",
    "inputSchema": {
      "properties": {
+       "limit": {
+         "description": "Session limit; omitted or 0 uses 100, upstream clamps values above 200",
+         "minimum": 0,
+         "type": "integer"
+       },
        "source_flow_id": {
          "description": "Source flow ID",
          "type": "string"

Current tools

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