vmware-nsx-security

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

With no annotations provided, the description carries the full burden. It successfully discloses that multiple membership criteria are ANDed together, which is critical behavioral context. However, it omits idempotency behavior (what happens if group_id already exists?), permission requirements, and whether the operation is atomic.

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 well-structured with the purpose front-loaded, followed by behavioral logic, then parameter details. While the Args section adds length, it is necessary given the schema deficiencies. The explanation of ANDing logic is concise and high-value. Minor deduction for slight redundancy between the criteria list and Args section.

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?

For a creation tool with 8 parameters and no output schema or annotations, the description adequately covers the input parameters and membership logic. It could be improved by describing the return value (success indicator, created object reference) and error scenarios (duplicate ID, invalid segment paths), but the core functionality is well-documented.

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?

Given 0% schema description coverage, the Args section provides essential documentation for all 8 parameters, including format constraints (group_id: 'alphanumeric, hyphens, underscores'), semantic meaning (display_name: 'Human-readable'), and concrete examples (tag_scope: 'env', ip_addresses: ['10.0.1.0/24']). This fully compensates for the schema's lack of 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 opens with a specific verb ('Create') and resource ('NSX security group'), immediately distinguishing it from siblings like delete_group, get_group, or list_groups. The addition of 'with optional membership criteria' clarifies the tool's scope and key functionality.

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 explains how membership criteria work (ANDed together) and lists available criteria types, which implies when to use the tool (when you need tag-based, IP-based, or segment-based grouping). However, it lacks explicit guidance on when NOT to use this versus alternatives like apply_vm_tag, or prerequisites like required NSX Manager configuration.

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