lambda_configure_iam

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

There are no annotations, so the description carries full responsibility for behavioral disclosure. It only says it 'generates' a role and policy, but does not state whether this mutates AWS resources, returns policy text, requires existing credentials, or overwrites anything. This is a meaningful gap for an infrastructure-related tool.

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 front-loaded sentence with no filler. Every word contributes to identifying the tool's purpose and output focus.

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?

The input schema covers parameter meanings, but the description omits expected output, side effects, required permissions, and whether this actually applies the IAM configuration or only generates artifacts. Given the tool's infrastructure scope and the lack of annotations or an output schema, the description is not complete enough for reliable invocation.

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%, and the schema already explains function_name, services, and api_key. The description adds only implicit context that 'services' drives least-privilege scoping, which does not exceed the baseline value provided by the schema.

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 uses a specific verb ('Generate') and a clear resource ('least-privilege IAM role and policy for a Lambda function'). It is immediately distinguishable from sibling Lambda tools like lambda_generate_function and lambda_add_layers, which target function code and layers rather than IAM configuration.

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 intended use is implied by the description: call this when you need an IAM role or policy for a Lambda function. However, it does not explicitly state when to prefer this over alternatives, nor does it describe prerequisites or exclusions, so the agent must infer scope from the tool name and resource.

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