cloudscope-mcp

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

No annotations are provided, so the description carries the full burden. It only discloses the default date behavior. It fails to mention read-only safety, rate limits, data latency, or what the return structure looks like (e.g., time series vs. single value), which is critical given the absence of an output schema.

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 two sentences with zero filler. The first sentence front-loads the core action (get breakdown) and parameters; the second efficiently communicates default behavior. Every word earns its place.

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 lack of annotations and output schema, the description should describe the return value (e.g., aggregated cost records) and any behavioral constraints. It also fails to mention that 'tag' is a valid grouping option. The description is incomplete for a 4-parameter data retrieval tool with rich siblings.

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?

Schema description coverage is 100%, establishing a baseline of 3. The description mentions grouping by 'service, resource group, or region' but omits the 'tag' option present in the enum. It adds no additional syntax guidance or examples beyond the schema's field descriptions.

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 tool retrieves a 'cloud spending breakdown' and specifies the grouping dimensions (service, resource_group, region) and date scoping. However, it does not explicitly differentiate this aggregation tool from siblings like 'top_spending_resources' or 'compare_periods'.

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 concrete operational guidance by stating it 'Defaults to current month if dates omitted,' which helps the agent handle optional parameters. However, it lacks strategic guidance on when to choose this tool over the seven available siblings (e.g., when to aggregate vs. compare vs. forecast).

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