Photos Performance Stats

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

The description says 'get performance statistics and cache information,' implying a read-only operation. However, the 'clear_cache' parameter can clear the cache, a potentially destructive action. This contradicts the annotations (destructiveHint=false, readOnlyHint=true) and is not disclosed in the description.

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 a single sentence, concise and front-loaded. However, it is somewhat terse given the tool's complexity and the need to address behavioral nuances.

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?

The tool is simple with well-documented parameters and an output schema. But the description lacks guidance on cache clearing and does not clarify the nature of the performance stats, leaving some gaps for the agent.

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?

Both parameters have descriptive entries in the schema (100% coverage). The description adds no additional meaning beyond the schema. The output schema exists but its content is not referenced.

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 retrieves performance statistics and cache information for Photos API usage. It uses specific verbs ('get') and resources ('performance statistics', 'cache information'), and is distinct from sibling tools like 'get_photos_library_info' or 'get_photo_details'.

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. It does not mention scenarios like debugging, monitoring, or when clearing the cache would be appropriate. Users are left to infer usage from context.

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