sec_struct_ent_sec_struct_id_entity_id_04ac5bc3

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description usefully discloses what is returned (per-residue predictions plus scores, labels, and source metadata), which matters because there is no output schema, but it does not explain the odd idempotentHint=false on a read operation or any rate/coverage limits.

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?

A single front-loaded sentence that begins with the action and resource before listing contents. It is slightly dense with parenthetical examples but every clause carries information; no padding.

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?

With no output schema, the description's enumeration of returned fields (helices, strands, per-residue predictions, scores, labels, source metadata) is the primary source of return-value information and is reasonably complete. The gaps are the missing usage routing and the unexplained non-idempotent read hint.

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 coverage is 100%: pdb_id and entity_id are both documented in the schema (including the numeric pattern for entity_id). The description only restates 'specified PDB Entity ID' and adds no format or constraint detail, so it sits at the baseline where the schema does the work.

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?

States a specific verb (Returns) and resource (secondary-structure annotations) scoped to a PDB Entity ID, and enumerates the payload (helices, strands, per-residue predictions). It is clearly distinguishable from siblings like doms_ent or annot_ent by content, though it never names an alternative tool.

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?

No when-to-use guidance, prerequisites, or alternatives are given. An agent must infer that this is the secondary-structure retrieval endpoint purely from the resource noun, with nothing telling it when another sibling (e.g. domain or annotation tools) would be the better choice.

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