vpc_create_network_acl

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

There are no annotations, so the description must disclose behavioral traits. It only says 'Create a network ACL' without mentioning prerequisites, side effects, permissions, or any constraints like VPC existence or region dependencies. This is insufficient for a tool that creates a resource.

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 extremely concise at three words, but conciseness should not come at the cost of completeness. A single sentence is efficient, but it sacrifices useful information.

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 complexity of VPC operations and the lack of output schema or annotations, the description is woefully incomplete. It does not explain what a network ACL is, its relationship to VPC, or what the tool returns. The agent cannot use this tool effectively without external knowledge.

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 three parameters (name, vpc_id, region) with no descriptions. The description adds no meaning about these parameters, such as what 'name' represents or that 'vpc_id' must be an existing VPC. With 0% schema description coverage, the description should compensate but does not.

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 'Create a network ACL' clearly states the action and resource, but it lacks specificity to distinguish this from other VPC create tools like vpc_create_security_group or vpc_create_subnet. It provides the bare minimum needed to understand the tool's function.

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?

No guidance is provided on when to use this tool versus alternatives. With many sibling tools for creating VPC resources, such as vpc_create_security_group or vpc_create_subnet, the agent has no context to decide which creation tool is appropriate.

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