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

Beyond the annotations, which only say readOnlyHint=false and destructiveHint=false, the description discloses that the page is owned by the verified caller, requires Bearer JWT auth, edits in place vs renames, and that style replacement semantics are intentionally destructive to the stored style object. It also details image constraints and fit behavior that an agent cannot infer from annotations or 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?

The description is front-loaded with the core operation and contains no filler; every constraint earns its place. However, the style block is a long, dense parenthetical run-on that could be more scannable, so it loses a point on structure.

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?

Despite having no output schema, the description covers all invocation-relevant context: required handle, authorization, ownership, mutation semantics, field constraints, and the replace-vs-preserve behavior for style. Nothing an agent needs to construct a valid request is missing.

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 only 17%, with most properties bare. The description compensates thoroughly: handle charset/length, display_name/bio limits, glyph length, links shape, style key meanings, numeric ranges, gallery size, and fit object fields. This is exactly the compensating detail needed for low schema coverage.

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 opens with 'Claim your public /@handle page (or update it...)' — a specific verb, resource, and dual create/update intent. It also clarifies the rename behavior, making it easy to distinguish from read-only page tools like page_get.

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?

It gives clear operational guidance: re-claiming the same handle edits in place, a new handle renames, and omitting style preserves stored values while sending the full object replaces them. It does not explicitly name sibling alternatives or state when not to use the tool, so it stops short of a 5.

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