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

No annotations are provided, so the description carries full burden. It discloses that the tool creates .brain/, a SPEC.md template, and git tags, but does not detail other side effects like whether the lane starts immediately or the reversibility of actions. The force parameter hint about isolation guards adds some transparency, but overall depth is moderate.

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 front-loaded with the primary purpose and includes a clear usage guideline. It is composed of a few sentences but could be more concise by merging repetitive statements. Nonetheless, every sentence adds value.

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?

Given the tool has 6 optional parameters and an output schema (not shown), the description covers the high-level operation and artifacts. It explains the daemon roles and the type of tasks suitable. It lacks specifics on next steps (e.g., using nucleus_lane_start), but overall is adequate for an agent to decide when to use this tool.

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 100%, so the baseline is 3. The description adds minor context about artifacts created (e.g., '.brain/', SPEC.md, git tag) that relate to parameters like tag and spec_path, but does not significantly augment the parameter meanings already provided 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 clearly states the tool sets up an autonomous task-execution loop in a git repo, explaining it runs daemons, creates .brain/, SPEC.md template, and pins via git tag. This distinguishes it from sibling lane tools like nucleus_lane_start and nucleus_lane_stop which likely manage an existing lane.

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 includes a 'WHEN TO USE' section that explicitly tells the agent to use this tool when they have a list of tasks to batch-execute automatically. However, it does not mention when not to use it or provide direct alternatives among siblings, though it implicitly differentiates from other lane tools.

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