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

Adds substantial context beyond the annotations: wholesale-replace semantics, the non-obvious fact that an empty content_type CLEARS it and reverts to the workflow's content type (with a concrete text/html → text/plain example), and that display_name is required and non-blank. Annotations already flag destructiveHint and idempotentHint=false, so the description's value is in explaining the blast radius rather than restating safety. It doesn't say whether a version is created or whether changes are recoverable, which keeps 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?

Front-loaded with the scope and the wholesale-replace warning, and every clause carries operational weight. The first sentence is heavily parenthetical, which slightly crowds the highest-value information, but nothing is redundant filler.

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?

Given a destructive, non-idempotent mutation with an output schema and full annotation coverage, the description supplies exactly the missing pieces: replace semantics, the clearing hazard, the required-field constraint, the recommended read-before-write flow, and where the out-of-scope fields belong.

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 real semantics: which parameters are metadata-only vs. owned by the versioning tool, and that all mutable fields must be passed together or they will be cleared. That says something the schema cannot — the interaction between fields, not just their types.

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+resource and immediately bounds the scope: metadata only, explicitly excluding the workflow binding, cache setting, and slug. It names the sibling that handles the excluded concern (create_dynamic_endpoint_version), so an agent can distinguish it from neighbors without opening schemas.

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 an explicit prerequisite workflow — read current values with get_dynamic_endpoint first, then pass all fields you want to keep — and routes the excluded concerns to the correct alternative tool. It also states a hard constraint (slug cannot be changed), leaving nothing to inference.

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