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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the mutation and safety profile is covered. The description adds the required 'manufacturers:write' scope, useful auth context, but does not disclose what gets overwritten or what the response contains.

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 with zero waste, front-loading the action and resource before the scope prerequisite.

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 seven-parameter mutation tool with no output schema, the description is minimal but functional: it names the key, the action, and the required scope. It omits any mention of partial-update behavior or consequences, leaving some gaps an agent would need.

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 all seven parameters are already documented in the schema and the baseline of 3 applies. The description only echoes the required 'id' and adds no field-level syntax or mutation semantics beyond the schema.

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 ('manufacturer') plus the identifying key ('by ID'), which distinguishes it from create_manufacturer and delete_manufacturer siblings. It stops short of explicitly naming or contrasting with 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?

The phrase 'update an existing manufacturer by ID' implies the usage context, and the scope note hints at prerequisites, but there is no explicit when-to-use guidance or statement of alternatives such as create_manufacturer for new records.

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