get_cache_stats

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. While it states the tool retrieves statistics (implying a read-only operation), it doesn't clarify important behavioral aspects such as whether this requires special permissions, what specific metrics are included, whether the data is real-time or cached, or if there are rate limits. The description is too vague about the actual behavior.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is appropriately concise with three brief sentences that cover purpose, arguments, and return value. It's front-loaded with the main purpose first, and there's no unnecessary verbosity. However, the structure could be slightly improved by integrating the argument/return information more seamlessly rather than as separate labeled sections.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given that there are no annotations and no output schema, the description should provide more complete context for a statistics-retrieval tool. It mentions returning a 'Dict with detailed cache statistics' but doesn't specify what those statistics include (e.g., hit rates, memory usage, eviction counts) or the format/structure. For a tool with zero parameters but potentially complex return data, this leaves significant gaps.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool has zero parameters, and the input schema has 100% description coverage (though empty). The description correctly notes there are no parameters beyond the context argument, which is appropriate. Since there are no parameters to document, the description doesn't need to compensate for any gaps, earning a baseline 4.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose with a specific verb ('Get') and resource ('current cache statistics and performance metrics'), making it easy to understand what the tool does. However, it doesn't explicitly differentiate from sibling tools like 'clear_cache' or explain how it differs from other monitoring/statistics tools that might exist.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. There's no mention of when this tool is appropriate (e.g., for monitoring cache health, troubleshooting performance issues) or when other tools like 'clear_cache' or 'prefetch_common_laws' might be more suitable. The agent receives no contextual usage instructions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.