picdefense_find_backlinks

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

Since no annotations are provided, the description carries the full burden of behavioral disclosure. It adds two important behaviors: the tool traces republished images ('other web pages where the image appears') and it consumes account credits. This is beyond the schema, though it doesn't mention output format or potential limits, which would be helpful for a tool with no output schema.

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 two sentences long and effectively front-loaded: the first sentence states the core purpose, the second provides a use case and cost implication. There is no wasted wording, and every phrase adds value.

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?

For a simple tool with a single parameter and no output schema, the description covers all essential aspects: what it does, its use case, and resource consumption. The schema covers URL requirements, and the sibling tools are unrelated, so no further context is necessary.

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 schema already provides a comprehensive description for the single parameter (url), covering its type, format, and example. The tool description adds no additional parameter semantics, so the baseline of 3 applies given the 100% schema coverage.

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 action: 'Find backlinks for an image' and defines what backlinks are ('other web pages where the image appears'). This specific verb+resource distinguishes it from sibling tools, which all focus on detection/extraction rather than backlink discovery.

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 a clear use case: 'Useful for tracing where a photo has been republished.' This implies when to use the tool, though it doesn't explicitly discuss alternatives or when not to use it. The sibling tools are all distinct operations, so there's no direct alternative to contrast with.

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