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

Annotations already declare destructive/idempotent/openWorld, but the description adds substantial context: the 2 MB page ceiling, public no-login access, that republishing the same name replaces the page while the link keeps working, and that no styling is added. It does not contradict any annotation, though permissions/auth requirements are left implicit.

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?

Front-loaded with the core action and cost ('Free. Takes HTML you wrote and hosts it...'), and most sentences carry actionable content. A few clauses are flavor/justification ('which is what a report somebody sends every month needs') that could be trimmed.

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?

With no output schema, the description conveys the return implicitly through the URL pattern and link-persistence behavior, and covers hosting constraints, no-templating, and update semantics. It is complete enough to invoke correctly, though it never explicitly states what the call returns.

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 baseline is 3; the description still adds value by constraining the html parameter to plain image URLs via get_asset and by explaining the 2 MB ceiling rationale and slug reuse intent ('use the client's name in the name').

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 and resource ('takes HTML you wrote and hosts it at postclick.ppc.io/r/<name>') with the concrete output and its public, no-login nature. This clearly distinguishes it from siblings like share_page, build_page, and export_page by naming the hosting target and the no-templating behavior.

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?

Gives explicit when-to-use and when-not-to guidance: use plain image links from get_asset with as: "url" here, whereas inlining is only for documents that block external images. It also explains re-publishing the same slug to update a recurring report and advises using the client's name.

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