MCP Datadog Server

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

No annotations are provided, so the description carries full burden. It implies a read operation ('Get'), but doesn't disclose behavioral traits such as authentication requirements, rate limits, error conditions, or what 'existing' entails (e.g., if it fails for non-existent keys). This leaves significant gaps for a tool with zero annotation coverage.

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 a single, efficient sentence with no wasted words. It's front-loaded and directly states the purpose, making it easy to parse quickly.

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?

Given no annotations, no output schema, and a simple purpose, the description is incomplete. It lacks details on return values, error handling, or how it interacts with sibling tools (e.g., vs. plural version). For a tool in a context with many similar 'get' operations, more specificity is needed to guide proper use.

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 tool has 0 parameters with 100% schema description coverage (empty schema). The description doesn't add parameter details, but with no parameters, this is acceptable. Baseline is 4 as per rules for 0 parameters, since no compensation is needed.

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 'Get an existing App Key Registration' clearly states the verb ('Get') and resource ('App Key Registration'), but it's vague about what exactly is retrieved (e.g., details, status, configuration). It doesn't distinguish from sibling tools like 'get_actions_app_key_registrations' (plural) or 'delete_actions_app_key_registration', leaving ambiguity about scope.

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?

No guidance is provided on when to use this tool versus alternatives. With siblings like 'get_actions_app_key_registrations' (likely for listing multiple) and 'update_actions_app_key_registration', the description offers no context on prerequisites, when this specific single retrieval is appropriate, or any exclusions.

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