Validation and conflict errors from Custom Agent session tools
Notion MCP's Custom Agent session tools now return specific HTTP 400 and 404 errors instead of a generic failure.
Notion MCP's Custom Agent session tools now return specific errors instead of a generic failure. A malformed session URL, a URL for a resource other than a session, or a full URL naming another workspace all return HTTP 400 validation_error, and notion-send-message-to-session returns a conflict error when the session already has a run in progress.
A valid URL for a session that's missing, inaccessible, or unsupported still returns HTTP 404 object_not_found. Developers should wait for a run to finish with notion-wait-session before sending another message.
