[enhancement] Show expected format from MCP tool inputSchema

[shapkarin]

Problem

When debugging MCP tools, the tool form renders fields from inputSchema, but the UI does not expose the data type and validation from the schema. This makes it hard to find out whether the MCP server provides a good schema for agents and clients.

Why this matters

The inputSchema is the main contract an LLM/Agent uses to understand how to properly call a selected tool.

Evn

MCP Inspector v0.21.2

[MartinHaeusler]

I'm bumping into this as well. Please show us - in JSON or otherwise - what the agent actually sees in terms of schema information. I'm having a really hard time figuring this out right now.

[shapkarin]

@MartinHaeusler from time to time I use Postman to check type and validation for MCP tools but I don't like relying on a proprietary solution. It would be 💯 great to have an inputSchema overview in MCP Inspector and/or data types and validation available directly in the form.

Please also check how the description is displayed #1401