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

Adds real context beyond the annotations: merge semantics (unpassed keys are preserved), the dependency on integrationSchema for valid keys, and that validation failures surface in output.errors and the call is retryable. It does not explain what happens when a passed key overwrites an existing value, which matters given destructiveHint=true.

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-loads the core action and scope in the first two sentences, then layers prerequisites and error behavior. Five sentences is on the long side and the integrationSchema note is repeated in both the description and the schema, but nothing is wasted.

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 an output schema and annotations already covering safety signals, the description supplies the missing pieces an agent needs: merge behavior, the schema-lookup dependency, and retry-on-validation-error. Only the overwrite/reversibility angle for existing keys is left implicit.

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 coverage is 100%, so the baseline is 3, but the description adds meaning the schema does not: merge-only semantics, that 'settings' keys come from integrationSchema, and that 'id' must come from a prior list call. It stops short of elaborating on id-vs-label resolution, which only the schema's nested value description covers.

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 (update provider settings of an existing post) and scopes it precisely to posts that were NOT published yet. It also draws the boundary that content and publish date are untouched, which separates it from publish/schedule and content-editing siblings.

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 a concrete precondition-plus-workflow: find the post first via listing your posts, then pass its id, and only pass the keys you want changed. It does not name the exact sibling (postsListTool) or say what to do for already-published posts, so routing is implied rather than explicit.

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