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

Annotations already mark this as non-read-only, non-idempotent, and non-destructive. The description adds useful behavior beyond that: creating a group involves no key material, runs locally, and returns a specific new object shape { id, orgId, name, slug, createdAt }. It does not fully explain side effects or idempotency failure modes, but the annotations and creation semantics cover the essential safety profile.

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?

The description is compact and well-ordered: it front-loads the core action, then explains the use case, the main alternative, the local-execution nuance, and the return shape. A few explanatory phrases are slightly ornate, but every sentence contributes either selection guidance or behavioral context. It earns its length.

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 3-parameter tool with 100% schema description coverage and no output schema, the description supplies the missing return shape and creation context. An agent can call the tool with confidence: it knows what to pass from the schema, when to use this tool versus create_app, and what it will get back. The mention of create_group_env also orients the agent to related follow-up operations.

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?

All three parameters have descriptions in the schema at 100% coverage, so the schema carries almost the full burden. The description mentions name and slug only in the return object and adds no new parameter-level semantics, constraints, or examples. Baseline 3 is appropriate because the field descriptions already exist in the schema.

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?

The description states a specific action and resource: 'Create a shared group' and defines what a shared group is (a reusable bag of secrets composed by many environments). It explicitly distinguishes the tool from create_app ('Use create_app instead for a deployable service') and clarifies the group's relationship to create_group_env. This is more than enough for an agent to understand what this tool creates.

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 gives explicit routing guidance: use create_app instead for a deployable service, while create_group is for shared secret bags. It also signals that no key material is involved, enabling local execution, and that group environments are minted by create_group_env, which points to the next step. Key alternatives are covered, so an agent can choose correctly.

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