init_agents

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

No annotations exist, so the description carries the full burden. It does disclose the key trait — idempotency and only acting when the file is absent — which is meaningful. It omits what happens on no-op (return value, error vs success), what content gets written, and permission/overwrite implications.

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?

A single short sentence with the critical qualifier ('if missing') and the idempotency note front-loaded. Nothing is wasted, though the extreme terseness leaves room for one clarifying clause without bloat.

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 one-parameter initializer with no output schema and no annotations, the description covers the core action but leaves the caller guessing about the target path's semantics and the no-op outcome. Adequate but with clear gaps for a tool that writes to disk.

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 description coverage is 0% — project_root is documented only by minLength/maxLength constraints. The description never mentions the parameter, so it adds no meaning about whether it is an absolute filesystem path, a directory containing AGENTS.md, or how the path is resolved. With one undocumented parameter, the description should compensate but does not.

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 ('Initialize') and a specific artifact ('AGENTS.md'), which distinguishes it from the many other init_* siblings that operate on plans, tasks, or audits. It never names those siblings explicitly, so the differentiation is inferred from the resource name rather than spelled out.

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?

'if missing (idempotent)' implies the condition under which it acts and that repeated calls are safe, which is useful. However, it gives no guidance on when to prefer this over sibling tools like init_plan or manual file creation, nor any prerequisites.

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