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

Annotations already declare non-read-only, idempotent, non-destructive, and open-world, so the safety profile is covered. The description adds genuinely useful context beyond annotations: it flags which settings (themes, custom colours, own banner colour, badge hiding, GA ID) are Premium-gated. It does not describe what clearing a field does or any other side effects, but the annotations carry most of that burden.

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 sentences, front-loaded with the concrete scope and followed by the entitlement list. No filler, and the reader gets the mutation target immediately.

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?

An output schema exists so return values need not be explained, and annotations cover the safety profile. The description supplies Premium context for a mutation tool with 8 optional parameters. It is adequate; only the missing usage routing keeps it from being fully complete.

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 the schema already documents all 8 parameters, including clear semantics like empty string clears a value and the YYYY-MM-DD India-time end date. The description only adds Premium gating and does not contribute syntax or format detail beyond the schema. Baseline 3 is appropriate.

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 clear verb and two specific resources: 'Change the page theme and the announcement banner across the top of it.' An agent can parse what is being modified. It does not, however, explicitly distinguish itself from closely-named siblings like update_page_behaviour or update_seo.

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?

There is no when-to-use guidance, no prerequisite conditions, and no pointer to alternatives such as get_page_settings for reading or update_page_behaviour for other page-level changes. The only contextual note is the list of Premium-gated features, which is entitlement info rather than usage routing.

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