MCP Datadog Server

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

No annotations are provided, so the description carries the full burden. 'List' implies a read-only operation, but it doesn't disclose any behavioral traits such as pagination, sorting, filtering capabilities, rate limits, authentication requirements, or what the output looks like. For a tool with zero annotation coverage, this is a significant gap in behavioral context.

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 with the core action and resource. However, it could be more informative by adding context, but within its minimal scope, it's concise.

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 the tool has no annotations, no output schema, and 0 parameters, the description is incomplete. It lacks essential context for a list operation, such as output format, pagination, or filtering hints. For a tool in a complex ecosystem with many siblings, more guidance is needed to help an agent use it effectively.

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 since there are none, which is appropriate. Baseline is 4 for 0 parameters as per rules, as 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 'List App Key Registrations' clearly states the action (list) and resource (App Key Registrations), but it's quite basic. It doesn't specify scope (e.g., all registrations, filtered by some criteria) or differentiate from sibling tools like 'get_actions_app_key_registration' (singular vs plural). The purpose is understandable but lacks specificity.

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 no guidance on when to use this tool versus alternatives. With sibling tools like 'get_actions_app_key_registration' (singular) and 'create_actions_connections', there's no indication of when to choose listing over fetching a specific registration or creating new ones. No prerequisites or exclusions are mentioned.

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