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

Annotations already declare destructiveHint=true, idempotentHint=true, readOnlyHint=false and openWorldHint=false, so the safety profile is largely covered. The description adds the auth scope requirement, which is genuinely useful context, but it omits what a destructive update destroys or whether unspecified fields are cleared.

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 short sentences with zero waste; the operation and its scope prerequisite are front-loaded and there is no filler or restatement of the title.

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 mutation tool with no output schema, the description plus rich annotations and complete parameter documentation cover what an agent needs to invoke it. The one remaining gap is the partial-vs-full update contract, which the idempotentHint implies but the text never states.

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 all seven parameters carry descriptions, so the schema does the heavy lifting; baseline 3 applies. The description adds nothing about partial-update semantics (e.g. that omitted fields are left unchanged), which is the main ambiguity for a 7-param update.

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 (Update) and resource (an existing manufacturer) plus the lookup key (by ID). It is clear enough to distinguish from create_manufacturer and delete_manufacturer, though it does not explicitly name those siblings.

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?

Adds one concrete prerequisite, the manufacturers:write scope, which tells the agent when the call will be permitted. However, it gives no guidance on when to prefer this over bulk_update or update_part, and no when-not conditions.

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