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 safety profile is covered. The description adds genuinely useful partial-update semantics ('omit fields you do not want to change'), consistent with the annotations. It does not, however, flag that the operation is destructive because passing null clears a value — that nuance only lives in the schema.

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, no waste, and the core action is front-loaded. The repeated 'Update Meta' heading is slightly redundant with the title, keeping it out of the top band.

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 two-parameter, optional-field update with an output schema and rich annotations, the description is sufficient: it names what changes and how to invoke a partial update. Return values need not be explained since an output schema exists.

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 the schema already documents both fields in detail (100/500 char limits, 'Null clears it'). The description adds nothing parameter-specific beyond what the schema provides, so the baseline of 3 applies.

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 ('the public page title or description'), which clearly distinguishes it from read-side getMeta and from the other write siblings like updateSettings and updateBranding. It does not explicitly name a sibling, so it lands just shy of the top band.

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 'Omit fields you do not want to change' sentence gives real invocation guidance for a partial update, which is above the bare minimum. However, it offers no when-to-use-vs-alternatives reasoning (e.g., getMeta to read current values first, or why this differs from updateSettings), so usage is only implied in context.

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