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

Annotations already declare readOnlyHint=false, idempotentHint=true, and destructiveHint=true, so the description is not carrying the safety profile alone. It usefully adds disclosure beyond the annotations: a per-owner cap of 200, the explicit absence of watch/notification side effects, and where the snapshot comes from. It does not explain why a save operation is flagged destructiveHint=true, which is the notable remaining gap.

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, front-loaded with the core action, then limit, then side-effect clarification, then payload semantics. Every sentence carries distinct information with no redundancy or filler.

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 one-parameter save tool with full annotation coverage and no output schema, the description covers purpose, side effects, quota, and payload handling. The only unresolved item is the meaning of destructiveHint=true on a save operation, which an agent might reasonably want clarified.

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% for the single id parameter, so the baseline is 3. The description adds genuine meaning beyond the schema: 'The client sends only the ID; the snapshot comes from the collection' tells the agent it need not construct or pass a snapshot payload, which the schema field description does not convey.

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+resource ('Saves the procurement') and immediately differentiates from the closest sibling by noting that saving 'does not create a watch or a notification', implicitly routing to watch_procurement. An agent can distinguish this from watch_procurement and remove_saved without opening any 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 clause 'Saving does not create a watch or a notification' gives a clear when-not signal that separates this from watch_procurement, and the 'up to 200 per owner' cap implies a collection-scoped use case. No explicit alternative is named and there is no positive 'use this when' statement, so it falls short of a full 5.

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