AlibabaCloud DevOps MCP Server

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 'Update a variable group', implying a mutation operation, but doesn't disclose any behavioral traits like required permissions, whether the update is idempotent, potential side effects, or error conditions. This leaves significant gaps for an agent to understand how to invoke it safely and effectively.

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 very concise—just one phrase—and front-loaded with the core action. There's no wasted text, making it efficient to parse. However, it might be overly terse, lacking necessary detail for a mutation tool with 9 parameters, which slightly reduces its effectiveness despite the brevity.

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 mutation tool with 9 parameters, no annotations, and no output schema, the description is incomplete. It doesn't explain what the tool returns, error handling, or behavioral nuances. The high schema coverage helps with inputs, but the overall context for safe and correct usage is lacking, making it inadequate for an agent to fully understand the tool's operation.

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 schema description coverage is 100%, meaning all parameters are documented in the input schema itself. The description adds no additional semantic information about parameters beyond what's in the schema (e.g., it doesn't explain relationships between fields like 'variableGroupName' and 'name'). Given the high schema coverage, the baseline score of 3 is appropriate, as the description doesn't compensate but also doesn't detract.

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 states the action ('Update') and resource ('a variable group'), which provides a basic purpose. However, it lacks specificity about what aspects of a variable group are updated and doesn't differentiate from sibling tools like 'create_variable_group' or 'delete_variable_group' beyond the verb. The '[application delivery]' prefix adds some context but doesn't fully clarify the scope.

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 like 'create_variable_group' or 'delete_variable_group'. The description doesn't mention prerequisites, such as needing an existing variable group to update, or any context-specific conditions for its use. It merely states the action without usage context.

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