Verify the configured TestRail credentials and report a structured diagnosis.

Calls a lightweight TestRail endpoint (get_priorities, which every authenticated user can reach) and translates the outcome into an actionable result the LLM can act on. Use this when:

• A user reports the server isn't working

• Another tool returns a 401/403/auth error and the cause is unclear

• Confirming setup is correct before kicking off a longer workflow

Returns a dict with at least:

• ok: bool — True if the credential check succeeded

• config: which URL / username / auth method the server is using (never includes the secret itself)

On success, also includes the priorities count and the username TestRail associates with the credentials. On failure, includes error_class, error, status_code (when extractable), and a human-readable hint explaining the most likely cause and remediation.

Browse all available TestRail API categories and their methods.

Returns a dict mapping each category name to its description and list of available method names. Use describe_testrail_method() to get details for a specific method, then run_testrail_command() to call it.

Describe a specific TestRail API method — its parameters, types, and docs.

Search for test cases by title (case-insensitive substring match).

Execute a TestRail API method.