profiles_photos

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. It adds value by specifying the scope ('from recent') and pagination behavior ('Use cursor to get next page of results'), which are not obvious from the tool name alone. However, it lacks details on permissions, rate limits, or response format, leaving gaps for a read operation.

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 extremely concise with two short sentences that directly address purpose and pagination. Every word earns its place, and it's front-loaded with the core functionality, making it efficient and easy to parse.

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 the tool's simplicity (0 parameters, no output schema, no annotations), the description is minimally adequate. It covers the basic purpose and pagination, but for a read operation with no structured output details, it could benefit from clarifying what 'profiles photos' entails (e.g., user avatars, uploaded images) or example use cases.

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 input schema has 0 parameters with 100% coverage, so no parameter documentation is needed. The description appropriately avoids discussing parameters, earning a baseline score of 4 for not adding unnecessary information beyond what the schema already provides.

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 as 'Read profiles photos (from recent)', which specifies the verb (read), resource (profiles photos), and scope (from recent). However, it doesn't explicitly differentiate from sibling tools like 'pages_photos' or 'profile_details_by_url', which might handle similar resources differently.

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 mentions pagination with 'Use cursor to get next page of results', but this is a behavioral detail rather than usage context. There's no mention of prerequisites, exclusions, or comparisons to sibling tools like 'pages_photos' or 'profile_posts'.

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