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

Annotations already declare idempotentHint=true, readOnlyHint=false, and destructiveHint=false, so the description's 'Update' is consistent. However, the description adds minimal behavioral context beyond the annotations—'using privacy-filtered project metadata' is vague and does not explain what happens to the existing layout, whether changes are merged or replaced, or any side effects. It does not contradict the annotations.

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?

The description is a single, compact sentence, which is concise. However, it is under-specified and does not front-load key information about the tool's behavior or parameters. It is not overly verbose, but it lacks substance needed for effective use.

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?

Given the tool has 6 parameters, a nested details object, no output schema, and no parameter descriptions, the description is grossly insufficient. It does not explain what the layout update does, how parameters relate, what the result is, or any constraints. An agent would be unable to use this tool correctly based on the description alone.

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?

The schema description coverage is 0%, and the description does not compensate by explaining any of the 6 parameters. It only hints at 'project metadata', which may relate to projectId, but does not clarify required fields like idempotencyKey, the details object, or expectedVersion. The description adds no meaningful semantic value over the bare 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?

The description states a specific verb ('Update') and a resource ('hosted set context layout'), making it clear what the tool operates on. However, it does not differentiate from sibling tools like context_write or update_context_note, and the term 'set context layout' is somewhat ambiguous without further context.

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 description provides no guidance on when to use this tool versus alternatives. There is no mention of exclusions, prerequisites, or scenarios where another tool would be more appropriate. The intended usage is only implied by the verb 'Update'.

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