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

With no annotations, the description carries the burden and does disclose pricing per endpoint, coverage scope, and data sources like Steam Market and Skinport. However, it omits behavioral details such as error handling, rate limits, or whether any actions have side effects, and it does not explicitly state that all endpoints are read-only.

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 a concise opening statement and a clearly formatted endpoint list with prices. Each line is purposeful given the 20 sub-endpoints, though the length is substantial.

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 tool with 18 parameters and 20 endpoints, the description lacks a mapping between actions and required/enabled parameters, which is critical for correct invocation. It also doesn't describe return formats or handling of invalid actions, leaving an agent to guess at endpoint-param relationships.

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?

The input schema covers all 18 parameters, and the description adds a domain context for some actions (e.g., skin-check relates to item), but it does not map which parameters are required for each action. Weak schema entries like 'set', 'card', 'name', and 'match' remain unexplained, and the description doesn't compensate for this ambiguity.

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 GamePulse as a gaming economy intelligence tool with specific verbs like 'skin-check' and 'roblox-check' covering global data. It distinguishes from sibling pulse tools by focusing on gaming use cases, though it bundles 20 endpoint actions under one umbrella rather than a single specific function.

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 provides a strong implied usage context ('gaming economy intelligence') and enumerates endpoint categories, but it never explicitly states when to prefer this tool over a sibling or when not to use it. There are no exclusions or alternative tool references, leaving usage guidance implicit.

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