bug: MCP - Invalid JSON Schema when using Docker MCP Gateway #650

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1. thdxr

   self-assigned this

   on Jul 4, 2025
2. Kirow commented on Nov 21, 2025

   

   Kirow

   on Nov 21, 2025

   Last edited by Kirow

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   After recent updates (1.0.62 worked few days ago) I start receiving error on any request when Docker MCP Toolkit is enabled. Not sure if it is related to docker update or opencode.

   Invalid schema for function 'MCP_DOCKER_mcp-config-set': In context=('properties', 'value', 'type', '4'), array schema missing items.

                   {
                       "type": "function",
                       "function": {
                           "name": "MCP_DOCKER_mcp-config-set",
                           "description": "Set configuration values for MCP servers. Creates or updates server configuration with the specified key-value pairs. Supports strings, numbers, booleans, objects, and arrays.",
                           "parameters": {
                               "type": "object",
                               "properties": {
                                   "key": {
                                       "type": "string",
                                       "description": "Configuration key to set. This is not to be prefixed by the server name."
                                   },
                                   "server": {
                                       "type": "string",
                                       "description": "Name of the MCP server to configure"
                                   },
                                   "value": {
                                       "type": [
                                           "string",
                                           "number",
                                           "boolean",
                                           "object",
                                           "array"
                                       ],
                                       "description": "Configuration value to set (can be string, number, boolean, object, or array)"
                                   }
                               },
                               "required": [
                                   "server",
                                   "key",
                                   "value"
                               ],
                               "additionalProperties": false
                           }
                       }
                   },
   
3. rekram1-node commented on Nov 24, 2025

   

   rekram1-node

   on Nov 24, 2025

   Contributor

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   Hm im not really sure, probably the docker mcp I don't think we have updated mcp stuff lately
4. fiuzagr commented on Dec 14, 2025

   

   fiuzagr

   on Dec 14, 2025

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   Maybe related to docker/mcp-gateway#275

   👍React with 👍1Reacted by Kirill Serebriakov
5. thdxr

   closed this as completedon Mar 25, 2026
6. bussard76

   added a commit that references this issue on May 12, 2026

   fix(session): replace meta labels with human narrative flow (anomalyc…

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