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 mentions 'Create a new budget or update an existing one' which implies mutation, but doesn't disclose behavioral traits like required permissions, whether updates are partial or full replacements, if changes are reversible, rate limits, or what happens on success/failure. For a mutation tool with zero annotation coverage, this is a significant gap.

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 that directly states the tool's purpose without unnecessary words. It's appropriately sized for a tool with no parameters, and every word earns its place by clarifying the dual create/update functionality.

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 this is a mutation tool with no annotations, no output schema, and 0 parameters, the description is incomplete. It doesn't explain what a 'budget' entails in this context, what data might be returned, or any behavioral constraints. The agent lacks sufficient context to use this tool effectively beyond the basic purpose.

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 has 0 parameters with 100% description coverage, meaning there are no parameters to document. The description doesn't need to add parameter semantics, so it meets the baseline. No additional parameter information is required or provided.

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 states the verb ('Create' or 'update') and resource ('budget'), making the purpose understandable. It distinguishes between creating new budgets and updating existing ones, which adds specificity. However, it doesn't differentiate from sibling tools like 'create_cost_aws_cur_configs' or 'update_cost_aws_cur_config' that might handle related but different resources.

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 many sibling tools for creating and updating various resources, there's no indication of whether this is for general cost budgets versus specific cloud provider budgets, or any prerequisites for usage. The agent must infer usage from the tool name alone.

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