Get an Embedded MCP action schema

Read an Embedded MCP action schema to find required arguments, lookup fields, response fields, and query controls.

get-action-schema tells you what an action accepts and returns. Read it before execute-actions unless search already returned the action's full schema.

Input	Use
`appRef`	Required app slug or ID.
`actionRef`	Required action slug or ID.
`appVersion`	Optional published version. Omit it for the current published version.

{"appRef":"slack","actionRef":"sendMessage"}

The output has data.app and data.action. The action includes required and optional arguments, response fields, and supported query controls. A shortened example:

{"success":true,"data":{"app":{"slug":"slack","name":"Slack"},"action":{"slug":"sendMessage","requiredArgs":[{"key":"channel","dataType":"string","needsResolution":true},{"key":"text","dataType":"string"}],"optionalArgs":[],"responseFields":["ok","ts"]}}}

If an argument has needsResolution: true, call resolve-lookup and use its selected value. Use only query filters, sort fields, and page controls declared by this action's schema.