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

Annotations already declare readOnly/idempotent/non-destructive, so the safety profile is covered; the description goes further by disclosing that this is a live operational listing whose retention and statuses can change mid-traversal, that results are a fixed-window page rather than a snapshot, and that enterprise platforms require existing entitlement. These are behavioral traits an agent cannot derive from the annotations.

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 core purpose and pagination rules are front-loaded in the first two sentences, and each sentence carries distinct information. It is denser than ideal for a list tool, and the 'not a visibility denominator or a snapshot' clause leans on negative definition, but nothing is outright redundant.

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 6-parameter, no-output-schema list tool with zero schema prose, the description supplies pagination semantics, filter behavior, window constraints, a follow-up tool for row detail, and an entitlement caveat. The main omissions are explaining platform/promptId individually and noting what a first call without a cursor looks like, so it is nearly but not fully self-sufficient.

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 0%, so the description must carry the load, and it does for most parameters: pageSize default 50/max 100, cursor usage via 'nextCursor', windowDays as a fixed 30/90-day started-at window, and the status values. 'Keep filters unchanged' implies platform/promptId/status behave as stable filters, but those two parameters are never explained individually, leaving a gap in an otherwise strong compensation effort.

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 gives a specific verb and resource ('Page every still-present execution') and narrows scope with concrete details: pending/running/failed/rate-limited records in a 30/90-day started-at window. It also clarifies what the tool is NOT ('not a visibility denominator or a snapshot'), which distinguishes it from summary-style siblings. However, it never names or contrasts the near-identical sibling devtune_list_visibility_responses, leaving the agent to guess between the two.

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?

It gives clear operational guidance: 'Keep filters unchanged with nextCursor' for pagination and 'Read each execution with devtune_get_visibility_response' as the follow-up for answer evidence, plus an entitlement prerequisite for enterprise platforms. What is missing is any explicit routing between this tool and devtune_list_visibility_responses, so the when-to-use-this-vs-that case is inferred rather than stated.

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