Prompts list fails to render if any schema contains a numeric field

[tailot]

Inspector Version

• v0.17.1

Describe the bug
The software returns an error if any schema contains field declarations of the 'number' type.

To Reproduce
Connect to mcp server -> prompts -> list prompts

Expected behavior
Return the list of prompts..

Screenshots

Environment:

• node v24.1.0
• google chrome 141.0.7390.66

Additional context
After defining the tools and prompts with the Genkit framework, I used an inelegant workaround: changing the schema fields from a number to a string format.

[olaservo]

Based on the spec, this behavior is expected.

In the GetPromptRequest definition, the arguments field is explicitly typed to only accept strings:

"arguments": {
  "additionalProperties": {
    "type": "string"
  },
  "description": "Arguments to use for templating the prompt.",
  "type": "object"
}

Prompt arguments are designed for templating and meant to be substituted into prompt text, which is why they're constrained to strings.