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

Annotations declare write (readOnlyHint=false) but non-destructive, and the description usefully clarifies the side effect it does NOT cause (no article scheduling). It says nothing about permission requirements, what happens to duplicate keywords, or the ordering/response of the batch beyond what annotations cover.

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?

A single tightly worded sentence with the operative constraint front-loaded; no filler. It is arguably too terse given what it must carry, but there is no wasted verbiage.

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 write tool with no output schema and 0% parameter documentation, the description leaves too much unstated: no auth requirements, no duplicate-handling behavior, no note on the 100-item cap, and no routing to add_article_keywords. It is not complete enough for confident invocation.

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 0% across 3 required parameters. The description gestures at 'keywords' (phrases) and 'website' (siteId) but never mentions projectId, and adds no format, limit, or accept/reject semantics to compensate for the missing schema documentation.

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 ('Save') and resource ('website's keyword list') and adds a distinguishing scope note ('without scheduling articles for them'). It does not, however, name the obvious sibling add_article_keywords, so the agent must infer which of the two save-like tools to pick.

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 explicit when-to-use or when-not-to-use guidance. The clause 'without scheduling articles' implies a contrast with a scheduling variant, but the agent is never told which alternative that is (add_article_keywords) or under what conditions this tool is preferred.

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