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

The annotations already indicate destructiveHint=true and readOnlyHint=false, aligning with the 'Delete' description. The description adds minimal behavioral context, merely specifying the resource type (instance snapshot) but not disclosing irreversibility, permission requirements, or side effects. Since annotations cover the destructive nature, a score of 3 is appropriate.

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 redundant, repeating the same statement twice separated by a dash. It could be shortened to a single clause. The phrasing is not efficiently structured and does not earn its place, as the second half adds no new 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?

For a destructive operation with multiple required parameters and no output schema, the description is severely incomplete. It does not explain the implications of deleting a snapshot, whether the instance must be stopped, or what happens to dependent resources. The sparse description fails to provide necessary operational context for a high-risk action.

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?

With 0% schema description coverage, the description must compensate by explaining the parameters, but it only mentions 'by id' without clarifying which parameter is which. The input schema lacks descriptions for instanceId, snapshotId, x-request-id, and x-trace-id, and the tool description does nothing to bridge this gap, leaving the agent guessing about required identifiers and headers.

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 specific verb 'Delete' and the resource 'existing snapshot by id', and further clarifies it is an 'instance snapshot by id'. This clearly distinguishes it from sibling tools like retrieveSnapshot, rollbackSnapshot, and updateSnapshot, which serve different operations.

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 provides no guidance on when to use this tool versus alternatives such as rollbackSnapshot or updateSnapshot. It does not mention prerequisites, conditions for deletion, or cases where deletion is inappropriate, leaving the agent without clear usage context.

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