ebi-pdbe-seq_cuuscu_acc_a66a4f59

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

Annotations already declare this a read-only, non-destructive (though non-idempotent) retrieval, so safety is covered. The description adds genuine value by enumerating what the payload contains: residue-level scores, per-residue amino acid probability profiles, sequence identifiers, sequence length, and track colors. It says nothing about error behavior for unknown accessions or payload size, keeping it at adequate rather than rich.

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?

Two sentences, zero waste, with the purpose front-loaded and the payload contents listed after. Every clause carries information the agent would not otherwise have.

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 single-parameter read-only fetch with no output schema, the description gives a solid inventory of the return payload, which is the main thing an agent needs. Minor gaps remain around failure modes and whether the response is large or paginated.

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?

There is a single parameter with 100% schema description coverage, so the schema already documents it. The description only repeats that the accession is a UniProt accession and adds no format or validation detail beyond that, which is the baseline case for high 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 opens with a specific verb+resource: 'Retrieve PDBe-KB sequence conservation data for a UniProt accession.' Given the opaque machine-generated tool name, this does the heavy lifting of telling the agent exactly what data comes back. It does not explicitly name or distinguish itself from sibling tools such as the per-entity sequence tools, so it falls short of a 5.

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?

Usage is only implied: the agent must infer 'use this when you need residue-level conservation data for a UniProt accession.' There is no when-not-to-use guidance and no mention of alternatives among the many sibling PDBe-KB endpoints, which is a real gap given the large sibling set.

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