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

Annotations already declare readOnlyHint/idempotent/non-destructive, and the description adds real value beyond them: the auth requirement (works with mcp:read tokens) and the bucket-level fields each entry carries. The 'Returns {data: [...]}' note is partly redundant with the output schema, keeping it from a 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?

Three short sentences, front-loaded with the action and scope, then the domain concept, then return shape and auth. Every sentence carries information.

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 no-param, read-only list tool with an output schema and full annotation coverage, this is sufficient: scope, entry contents, auth precondition, and response envelope are all conveyed.

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?

Zero parameters, so the baseline is 4; the description correctly says nothing about params and instead describes the entry fields, which is the relevant semantic information here.

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 (List) and resource (check groups) with scope (for the organization), and defines what a check group is, which distinguishes it conceptually from sibling list_checks. It stops short of naming the sibling it differs from explicitly.

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 org-level scope and the definition imply when the tool is useful (browsing grouped checks for incident handling/dashboards), but there is no explicit when-to-use or when-not-to-use guidance relative to list_checks or get_check.

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