tool_arg has to be a string?

[likms]

inspector/cli/src/index.ts

Line 137 in ec24f7b

function parseKeyValuePair(

The parseKeyValuePair function treats all values as plain strings, so it fails to parse JSON strings into objects, causing structured data like {"name":"value"} to be misinterpreted as a string.

[scottslewis]

Seeing this also in v0.13.0 and python sdk FastMCP server. This really limits the usefulness of the Call Tool button for testing servers. I've got int arguments and return values but I imagine that the arg type handling/conversion fails for anything that's not a string.