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• Add explicit output schema documentation for each tool. Example for datetime: 'Returns: {"iso_string": string (ISO 8601), "unix_timestamp": number, "timezone": string}'
• Convert timezone parameter to an enum or add pattern constraint with validation guidance: 'timezone must be a valid IANA timezone identifier (e.g., America/New_York, Europe/London, UTC). Invalid values will be rejected.'
• Expand plan_get description to clarify: 'Retrieves the current canonical plan in Markdown format. Call this before plan_set_content to avoid overwrites. Returns the full plan text and metadata (version, last_modified timestamp).'
• Expand plan_set_content description to include: 'Replaces the entire plan with new Markdown content. This operation is idempotent, setting the same plan twice is safe. Requires valid Markdown format. Maximum size: [X] bytes. Returns confirmation with new version ID and timestamp.'
• Add parameter constraints for plan_markdown: 'Must be valid Markdown syntax. Maximum 1MB. Minimum 10 characters. Invalid Markdown will return a validation error with the problematic line number.'
• Document failure modes and recovery: 'If timezone is invalid, a list of suggestions will be returned. If plan Markdown is malformed, the response includes the line number and suggests fixes.'
• Add example usage patterns in descriptions to show LLM how to compose tools: 'Typical pattern: plan_get() to fetch current, modify locally, then plan_set_content() with updated Markdown.'
• Declare tool risk levels in descriptions: plan_set_content is WRITE (has side effects, log for audit), plan_get is READ_ONLY.