AWS FinOps MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states what the tool does but doesn't describe how it works—e.g., whether it scans all clusters, requires specific permissions, has rate limits, returns structured data, or handles errors. This leaves significant gaps for an agent to understand operational behavior.

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 front-loaded and wastes no space, 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 the tool's complexity (6 parameters, no annotations, but has an output schema), the description is insufficient. It explains the goal but lacks details on inputs, behavior, and how results are structured, leaving the agent with too many unknowns despite the output schema potentially covering return values.

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 6 parameters with 0% description coverage, and the tool description adds no information about any parameters. It doesn't explain what 'region_name', 'profile_name', or authentication parameters do, nor their relationships, leaving all parameters undocumented and unclear in usage.

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 'find' and resource 'ElastiCache clusters not running the latest engine version', making the purpose immediately understandable. However, it doesn't explicitly differentiate from sibling tools like 'find_outdated_ecs_platform_versions' or 'find_outdated_rds_engine_versions' beyond the resource type, missing specific comparison points.

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, such as other 'find_outdated_' tools or general analysis tools in the sibling list. It lacks context about prerequisites, timing, or specific scenarios where this tool is most appropriate.

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