Create links in bulk

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

Goes well beyond the annotations: it discloses per-item error isolation ('gets its own result'), the specific failure mode for duplicate slugs (per-item 409, not a whole-batch failure), and that re-runs are therefore safe — context that reinforces idempotentHint with the actual mechanism. It also tells the caller where to look for success, 'results[i].ok', which compensates for the absent 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?

Three tight sentences: scale and use cases first, per-item semantics second, result-reading instruction last. No filler and nothing buried.

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 bulk mutation with no output schema, it covers scale, atomicity (per-item results, no whole-batch rollback implied), duplicate handling, and retry safety. Remaining gaps are minor: payload-size or rate-limit expectations for a 500-item call and what a per-item validation failure looks like beyond the 409 case.

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?

Only one top-level parameter, and the description adds little beyond the schema: the 500 cap is already maxItems and the minimum is already minItems. The one genuine addition is that item-level validation follows create_link, which is useful but does not explain any item field semantics.

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 and resource with scope: 'Create up to 500 links in one call', and immediately frames it against the single-item sibling by noting each item is 'checked like create_link'. An agent can distinguish bulk creation from create_link without opening either schema.

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?

Names concrete scenarios (imports, migrations, campaigns) that call for the bulk variant and explains that re-running an import is safe, which is the key decision criterion. It stops short of an explicit 'use create_link for a single link' routing statement, so the alternative is implied rather than stated.

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