ghl_brand_board_set_default_design_kit

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

Goes beyond annotations by disclosing the key side effect: 'The previous default will be unset.' It also states the auth requirement (Sub-Account/location token) and required OAuth scope brand-boards/design-kit.write, which annotations (readOnlyHint=false, destructiveHint=false, openWorldHint=true) do not convey. It does not describe the response or pagination, but no output schema exists so that is a minor gap.

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?

Three short lines: action plus side effect first, then endpoint metadata, then auth scope. Every sentence is useful, though the version header and source file reference are marginally operational noise for an agent that just needs to call it.

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 two-parameter mutation with no output schema, the description covers the action, the destructive-ish side effect on the prior default, the auth token type, and the required scope. An agent has everything needed to call it correctly; only the return shape is unspecified.

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% with both parameters fully described, so the schema carries the semantics. The endpoint line only implies that locationId scopes ownership and designKitId targets the kit, adding no format or constraint detail beyond the schema. Baseline 3 applies.

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 ('Set a design kit as the default for a location') and scopes it to a single location. It is clearly distinguishable from the sibling ghl_brand_board_set_default_voice and from ghl_brand_board_update_design_kit.

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?

The description implies when to use it (when a location needs a different default design kit) and names the prerequisite of a location and kit ID. It never says when not to use it or points to an alternative such as update_design_kit for other changes, so the guidance 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.