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

Beyond the annotations, the description adds meaningful behavioral constraints: the name must be unique per workspace, matching is case-insensitive, and all accounts must belong to one workspace. This helps the agent anticipate validation failures and use the tool correctly.

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, each carrying distinct useful information: purpose, downstream benefit, and constraints. No filler or repetition; the most important behavior is front-loaded.

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?

The description is complete for a low-complexity create operation. It covers purpose, constraints, and relationship to posts_schedule, while the output schema handles return values and the annotations cover safety/idempotency.

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 important parameter-level semantics: name uniqueness and case-insensitivity for 'name', and the one-workspace constraint for 'account_ids'. This goes beyond the schema's basic descriptions.

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 uses a specific verb and resource ('Name a set of accounts') and immediately clarifies the downstream purpose: posts_schedule can use the group name instead of every id. This makes the tool's role distinct from sibling group operations like groups_list, groups_update, and groups_delete.

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 clearly implies when to use this tool: when you want to bundle accounts so they can be referenced by a single name in posts_schedule. It does not explicitly name alternatives or exclusions, but the context is clear enough for an agent to decide.

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