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

With readOnlyHint=false, destructiveHint=false and openWorldHint=true already declared, the description adds real value: a plain read also refreshes matching tools and pulls answers from other agents (a side effect worth knowing), and the close path is gated on the secret return_token. It does not say what closing does to the need's discoverability or whether close is reversible, so it is not complete.

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 plus one example, front-loaded with the primary read behavior before the secondary close mode. Nothing is padded and the example earns its place by showing the id format.

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?

There is no output schema, so the description usefully states what comes back (refreshed matching tools and answers from other agents). Combined with the close-mode note and the id example, an agent has enough to call it correctly; only the post-close state is left unspecified.

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 need_id, return_token and close are all fully documented in the schema — the description's mention of the return_token + close=true combination restates that rather than extending it. The example object adds a bit of calling context but no new parameter semantics, so the 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?

Names a specific verb (reads) and resource (a need) scoped by need_id, and explicitly discloses the second mode (close with return_token and close=true). The 'by need_id' scoping cleanly separates it from list_open_needs, and no sibling closes a need, so an agent can place it without opening the 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?

The 'Use when: you posted a need earlier and return to check progress' line gives an explicit triggering context, which is exactly the right framing for a revisit tool. It stops short of naming when-not or pointing at alternatives such as list_open_needs, so it is clear context rather than full routing guidance.

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