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

Annotations already declare readOnlyHint/destructiveHint=false, and the description reinforces this while adding real value beyond them: it states that the return is 'suggestion inbox items and IDs for later apply/discard/snooze tools without changing documents.' That tells the agent what it gets and that it is a safe, non-mutating read, which is more than the annotations convey.

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 tight sentences, front-loaded with the usage condition and followed by the behavioral note. Nothing is wasted, though the status enumeration is slightly overlong for the value it adds.

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 correctly steps in to say it returns inbox items and IDs, which is what an agent needs to chain into apply/discard/snooze. Pagination/limit behavior is left to the schema, which is fine since it is documented there.

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 the schema already documents limit, status, batch_id, and space_id (including the 'call list-spaces first' hint). The description adds no parameter-level detail and its status examples actually conflict with the schema enum, so the baseline 3 is appropriate.

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 ('list ... documentation suggestions for a Space') and distinguishes itself from mutation siblings like apply/discard/snooze by framing it as a review operation. The status list ('pending, snoozed, done, high-confidence') does not match the schema's accepted values (pending, applied, discarded), which slightly muddies what it actually returns.

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?

'Use this when the user wants to review ... suggestions' gives a clear triggering context, and it explicitly positions itself as the read step preceding apply/discard/snooze. It never names count-space-suggestions or bulk-manage-space-suggestions as alternatives, so the routing is helpful but not exhaustive.

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