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

Annotations declare readOnlyHint=true, and the description adds useful behavioral context by explaining that the tool combines KB signals with ADO history and returns a phase breakdown, confidence level, and risk factors. It also notes the focusObjects parameter can speed up the estimate, which is beyond what the schema alone provides.

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 clear sections (WHEN, PRIORITY TRIGGER, Returns, Triggers) and front-loads the core purpose. It is slightly redundant because trigger phrases appear both in the WHEN/PRIORITY TRIGGER section and in the final Triggers list, but the organized layout keeps it scannable and useful.

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?

With no output schema, the description compensates by explicitly listing return contents: per-phase hour breakdown, KB signals, confidence level, risk factors, and a paste-ready estimate. It covers key context like trigger conditions and sequencing with a previous analysis step. It does not describe error or edge-case behavior, but that is not critical for this read-only estimator.

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 each parameter already includes descriptive text (workItemId example, project fallback, focusObjects force-include behavior). The tool description adds little parameter-level meaning beyond the schema, 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?

The description opens with a precise verb and resource: 'Estimate D365 F&O development effort for a Work Item.' It clearly distinguishes itself from siblings by framing the output as a structured hour estimate with per-phase breakdown, not analysis, creation, or comment posting.

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 explicitly tells the agent when to call it ('WHEN: user asks for an effort estimate...'), gives the priority sequencing ('call AFTER ado_analyze_workitem'), and provides concrete trigger phrases such as 'estimate WI #N', 'how long for WI #N', and 'chiffrage WI #N'. This is explicit, actionable usage guidance.

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