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

Annotations cover the safety profile (readOnlyHint=false, destructiveHint=false, openWorldHint=false), and the description adds genuinely new behavioral context — that 'Replace' overwrites the existing schedule wholesale and that one mode value publishes without human review. It still omits permission requirements, validation failure behavior, and what happens to already-scheduled posts, keeping it below 5.

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 tight sentences with zero filler; the mutation semantics come first and the prerequisite read plus the risk disclosure follow. Every clause earns its place.

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 9-required-parameter mutation tool with no parameter descriptions and no output schema, the definition is under-specified — an agent cannot construct a correct call because the meaning, format, and constraints of most fields (timezone string format, day-index array, lead hours) are invisible. The mode caveat is helpful but does not close this gap.

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?

There are 9 required parameters with 0% schema description coverage, so the description must carry parameter meaning — yet it explains none of them (timezone, generationLeadHours, publishingDays, publishTime, defaultCmsConnectionId are all opaque). Only the 'auto_publish_approved' enum value gets any gloss, which is a small fraction of the documentation burden.

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 ('Replace') and resource ('the automatic writing and publishing schedule'), making the mutation scope unambiguous. It also implicitly distinguishes itself from its read counterpart by directing the agent to get_content_automation, so an agent can route correctly without opening a schema.

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 clear prescriptive context: read current state with get_content_automation before replacing it, and names the risky enum value (auto_publish_approved → publishes without human review). No when-not-to-use guidance or alternatives beyond read-before-write, so it falls 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.