compare_items

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the tool compares metrics but does not explain how the comparison is performed, what 'other metrics' include, whether it requires authentication, rate limits, or error handling. This is insufficient for a tool with potential complexity in data retrieval and analysis.

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, efficient sentence that front-loads the core purpose. It avoids unnecessary words, though it could be slightly more structured by explicitly listing the metrics or clarifying the scope of 'other metrics'.

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 no annotations and no output schema, the description is incomplete. It lacks details on behavioral traits, output format, error cases, and how it differs from siblings. For a comparison tool with potential data source variations, this leaves significant gaps in understanding its full context and usage.

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?

Schema description coverage is 100%, so the schema fully documents the parameters ('items' and 'datasource'). The description adds no additional meaning beyond implying that 'items' are used for comparison, which is already clear from the schema. Baseline score of 3 is appropriate as the schema handles parameter documentation adequately.

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: comparing Trust Flow, Citation Flow, and other metrics across multiple URLs/domains. It specifies the verb ('compare') and resources ('URLs/domains'), but does not explicitly differentiate from sibling tools like 'get_index_item_info' or 'get_top_pages', which might provide related but different functionality.

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 comparing metrics but does not specify scenarios, prerequisites, or exclusions, such as when to use 'get_index_item_info' for single-item analysis instead. This lack of context leaves usage unclear.

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