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

Annotations already set readOnlyHint=false and destructiveHint=false, and the description adds real behavioral detail beyond them: it claims/consumes Work, may auto-start the next planned batch, and returns the Work brief plus the project's own instruction documents. The disclosed implicit side effect (automatic batch start) is the kind of trait annotations cannot convey.

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?

Four tight sentences, front-loaded with the core action before the claiming/run details. Some jargon ('boundary call', 'developing there', 'implementable work') is slightly opaque but overall efficient with little waste.

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 mutation tool with no output schema and all parameters described, the description covers invocation paths and even what is returned (brief + instruction documents). It does not mention permissions/auth requirements or failure behavior, a minor gap given the annotations already cover the safety profile.

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% (baseline 3), but the description adds meaning beyond the schema field blurbs: projectId specifically resumes the active Work or claims the next ordered one, and runId only matters when several runs are open. This relationship logic is not present in the schema 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?

States a specific verb+resource: 'Begin repository implementation' by claiming, resuming, или kicking off a Work/Batch. The mechanics (claim by workId, resume/claim-next by projectId) distinguish it clearly from siblings like create_work, get_work, and finish_work, though it never names an alternative tool 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?

Explains request intent well: pass workId to claim, projectId to resume/claim the next ordered Work, runId when multiple runs are open. This tells the agent when each path applies. It lacks explicit 'use X instead' routing against siblings such as get_work or resume_workflow, so it stops short of a 5.

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