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

Annotations already cover mutability, non-idempotency, open-world reach and non-destructiveness, so credit goes to the extra facts: the operation completes 'within a few minutes' (a duration/async signal an agent needs for timing) and 'sends no message' (an explicit no-side-effect-on-people guarantee). It still does not say what happens to members with no matching Slack account or what the run returns.

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 short sentences, no redundancy, with the core action front-loaded before the safety guarantee and the timing detail. Every sentence carries distinct information.

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 tool with full annotation coverage and a fully documented schema, the description supplies scope, preservation semantics, duration and side effects. The remaining gap is outcome information — how to interpret matched vs unmatched members after the run — which matters somewhat given there is no output schema.

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% and both parameters (company UUID, idempotency_key) are documented in the schema itself. The description adds nothing about either parameter, so baseline 3 applies.

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 (match), both resources (company members and Slack accounts), the scope (every member, i.e. bulk), and the matching criteria (email and name). The word 'again' plus 'every' distinguishes it from the single-record siblings summer_slack_member_link_read and summer_slack_member_link_update without needing to name them.

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?

'Again' implies re-running and 'accounts people signed in with or chose stay as they are' tells the agent manual links are safe, which is genuine usage context. However, it never states when to prefer this over summer_slack_member_link_update or summer_teammates_slack_link_create for a single member, so the routing decision is left to inference.

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