tiny-loop provides 11 tools with partial schema coverage and uneven description quality. Most tools have basic JSON Schema input definitions with type and required fields present, but descriptions are inconsistent, some are absent, and parameter documentation is incomplete. The framework uses Rust procedural macros (#[tool]) to auto-generate schemas via schemars, which ensures consistency for tools that are properly macro-annotated. However, 4 out of 11 tools lack descriptions entirely (custom_tool, custom_method_one, custom_method_two, param_multi_line_doc), and 7 tools have minimal descriptions. Tool naming is verb-noun style (fetch, read, write, add, get_weather) which follows conventions, but the semantics are domain-specific and some tools (custom_tool, custom_method_one, custom_method_two) serve only as demonstration/test fixtures with no real-world context. Parameter descriptions exist for most tools but are trivial (e.g., 'Data key', 'First number') and do not explain constraints, ranges, or format expectations. Output schemas are not documented, callers must infer return types from documentation or code inspection. Error handling is not specified in tool definitions.

• Add descriptions to custom_tool, custom_method_one, custom_method_two, and param_multi_line_doc. Each must explain what the tool does, when to call it, and what it returns.
• Expand parameter descriptions from generic terms ('Data key') to actionable constraints: 'key: A case-sensitive string identifier (1-255 chars). E.g., "user:alice" or "session:12345". Required.'
• Document output schemas explicitly in tool descriptions or as separate metadata. Include field names, types, and semantics: 'Returns: {"value": string, "found": bool, "timestamp": ISO8601}'.
• Add error handling guidance to tool descriptions. E.g., fetch: 'Returns "Key not found" if key does not exist, retryable with list_keys() to discover valid keys, or ask user for clarification.'
• Rename test/demo tools to reflect their actual purpose or remove them from production deployments. If testing parameterization, use internal-only annotations or exclude from agent tool sets.
• Review parameter type constraints: add enums for multi_line_doc and method_with_doc parameter 'param' if it accepts specific values; document any restrictions in descriptions.
• Consider adding batch variants for tools likely to be called in loops (e.g., fetch_batch accepting array of keys) to reduce sequential calls and token waste.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry