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

With no output schema, the description carries the return-value burden and does so well, enumerating the exact fields per pair and the app_score/competitor_score comparison semantics. Annotations already cover read-only/safe-profile, so this adds genuine behavioral context rather than repeating it.

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?

Front-loaded with the verb+resource, then a structured enumeration of pair contents. The field list is dense but informative given the absent output schema; only minor trimming would be possible without losing return-shape clarity.

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 read-only list tool with no output schema, the description adequately explains the return structure, score semantics, and the sibling alternative. It doesn't describe pagination or empty-result behavior, a minor gap given the simple closed-world read.

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 there is one optional param, so the schema already documents app_id fully. The description adds no filter semantics beyond the schema-provided numeric example, making this baseline-level.

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 (List) and resource (competitor tracking pairs), then details exactly what a pair contains. It also explicitly distinguishes itself from list_applications, so an agent can separate it from the many siblings without opening schemas.

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?

Explicitly routes the agent to list_applications for the user's own app metadata, which is clear context. It stops short of stating when to prefer this over add_competitor/remove_competitor or the filtering effect of app_id, so it's clear but not fully exhaustive.

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