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

Annotations already flag destructiveHint=true and readOnlyHint=false, so the replace semantics are known; the description adds the 60000-character cap, the side effect that a brand-new guide marks the language's translation memory stale, and the default-off recheck flag. It does not state whether a replaced guide is recoverable, but the destructive side effects are well disclosed.

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?

Dense but front-loaded: purpose and keying first, then side effects, then the UX rule about showing names/locales instead of UUIDs. Every sentence carries information, though the trailing id-formatting instruction slightly widens the scope.

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 annotations and an output schema present, the description covers all an agent needs to invoke correctly: required ids, the size limit, update-vs-create behavior, and the stale-memory side effect. Only the recoverability of a replaced guide is unaddressed.

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; the description goes further by clarifying that recheckExistingTranslations only matters on update and defaults to off, and that a new guide always marks memory stale. It also implicitly distinguishes project/projectLanguageId roles that the schema labels.

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 pair (create or replace), the resource (style guide / free-text translation instructions), and the scope (one target language of a project, keyed by project_language id). This cleanly separates it from get_style_guide, list_style_guides, and delete_style_guide.

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?

Explains the create-vs-update distinction and how to obtain the required project_languageId via get_project, plus the condition that selects recheckExistingTranslations. It stops short of naming sibling alternatives explicitly, but the operational context is clear.

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