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

With no annotations, the description carries the behavioral burden and does so well: it flags this as a confirmation-gated write action, states the required credentials and permission scope (DEVOPS_ORG_URL + DEVOPS_PAT with Pull Request Threads Read & Write), and insists it run after ado_analyze_pr_impact. It does not disclose idempotency, editability, or deletion behavior of posted comments.

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 well-structured with WHEN, PRIORITY TRIGGER, WARNING, Recommended workflow, and Requirements sections. It is front-loaded with the most important trigger and safety information, and every line contributes operational 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?

For a mutation tool with 6 parameters, no annotations, and no output schema, the description supplies prerequisites, trigger conditions, sequencing, confirmation requirements, and credential expectations. It lacks explicit notes on success/failure behavior or return values, but the core action is straightforward and schema covers the parameters.

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 schema already documents all parameters and the baseline is 3. The description adds one useful semantic hint—that commentText should use the ready-to-post block from ado_analyze_pr_impact—but otherwise does not materially expand on 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 identifies the action: posting/add/saving a review comment to an ADO Pull Request, with a WHEN trigger and a named prerequisite tool, ado_analyze_pr_impact. However, it does not explicitly differentiate itself from the sibling ado_post_comment, so the distinction is implied rather than stated.

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 gives explicit WHEN and PRIORITY TRIGGER conditions, mandates user confirmation before calling, and provides a numbered workflow. It does not explicitly say when to use a different tool such as ado_post_comment instead, so alternative routing is incomplete.

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