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

Beyond the annotations (which only carry safety hints), the description discloses asynchronous behavior ('Returns pending while it works'), the required follow-up read via get_page, the side effects ('may edit the page or the brief'), and a cost model ('model budget; the first draft of a page uses one Content Studio page'). These are exactly the non-obvious traits an agent needs before invoking a write tool.

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?

Three compact sentences, front-loaded with the purpose and then the async behavior and cost. Nothing is padded; the cost sentence is terse but does carry unique information.

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 four-parameter write tool with an output schema, the description covers purpose, side effects, async return handling, and cost. An agent can decide to call it, know that 'pending' is expected, and know how to retrieve the reply.

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 four parameters, including the idempotency_key replay semantics. The description adds no parameter-level guidance beyond that, which is the expected baseline when the schema does the heavy lifting.

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 gives a specific verb and resource ('Talk to a page's agent as you') plus four concrete intents (answer its question, ask for a change, approve its outline, ask why), so the agent knows exactly what kinds of actions this covers. It stops short of naming siblings such as edit_page or revise_page, and the clause 'may edit the page or the brief' is the only hint at how this differs from a direct edit tool.

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 enumerated intents function as clear use-cases and the follow-up path is stated ('read the reply with get_page'). There are no explicit exclusions, however — nothing says when to use edit_page or revise_page instead of routing through the page agent.

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