scm-mcp

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 this is an update operation, implying mutation, but doesn't describe what happens on success/failure, whether changes are immediate or require a commit, permission requirements, or error conditions. This leaves significant gaps for a mutation tool with 13 parameters.

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 a clear purpose statement followed by a parameter list. It's appropriately sized for a tool with many parameters, though the parameter explanations are brief and could be more informative. No unnecessary information is included.

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 (13 parameters, mutation operation), lack of annotations, and no output schema, the description is incomplete. It doesn't cover behavioral aspects like side effects, authentication needs, or response format. While it documents parameters well, it misses critical context for safe and effective use.

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 description provides a comprehensive parameter list with brief explanations (e.g., 'UUID of the NAT rule to update', 'New name (optional)'), adding meaningful context beyond the schema's 0% description coverage. It clarifies optionality and default values (e.g., 'Defaults to SCM_TSG_ID'), though it doesn't explain parameter formats or constraints in detail.

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 ('Update') and resource ('existing NAT rule'), making the purpose unambiguous. It distinguishes this from sibling tools like 'scm_create_nat_rule' and 'scm_delete_nat_rule' by specifying it's for updates, though it doesn't explicitly contrast with other update tools like 'scm_update_security_rule'.

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. While the description implies it's for modifying existing NAT rules, it doesn't mention prerequisites (e.g., needing the rule_id), constraints, or when to choose creation or deletion tools instead. The sibling list includes many update tools, but no differentiation is offered.

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