uvcs_checkin_confirm

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

Annotations already declare readOnlyHint=false, idempotentHint=false, destructiveHint=false, so the mutating, non-repeatable nature is known from structured data. The description adds the human-approval gate and the fact that all tracked pending changes may be swept in, but says nothing about token lifetime, whether the checkin is reversible, or what a failed confirmation returns.

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?

Two sentences, no filler, with the operation described first and the critical safety gate immediately after. Nothing here is redundant with the title or schema.

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 two-parameter confirmation tool with full schema coverage and no output schema, the description covers the operation, its scope, and the approval prerequisite. The main residual gap is error/expiry behavior for the token, which matters slightly for a non-idempotent mutation.

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% and both parameters (token, confirmPhrase) are documented in the schema, including the exact phrase string. The description adds no parameter-level meaning beyond that, so the baseline of 3 applies.

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?

Specific verb + resource ("Run a prepared checkin") with the scope spelled out as all tracked pending changes or the selected paths, and it ties itself to the uvcs_checkin_prepare output. It is distinguishable from the prepare sibling by the word "prepared" and by actually executing, though it never names the sibling 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?

"Call only after the user has reviewed the prepared payload and explicitly approved this exact operation" is an explicit precondition and a clear gating rule, which is unusually good. It stops short of stating the failure path (e.g. what to do if no prepare token exists) but the when-to-use condition is unambiguous.

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