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

Annotations are provided (readOnlyHint=false, destructiveHint=true, idempotentHint=true, openWorldHint=true), so the safety profile is known. The description adds the precondition that the task must be previously paused, which is a meaningful constraint not in the annotations. However, it does not disclose other behavioral aspects like what happens on resume (e.g., continuation point, side effects) beyond the annotations.

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 a single concise sentence, front-loaded with the action. It contains no fluff or redundant information, earning its place with the key detail that the task is previously paused.

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 tool's simplicity (one parameter, output schema exists), the description is reasonably complete. However, it lacks usage context and does not explain the implications of the destructiveHint annotation. The 'previously paused' precondition is helpful, but the description does not describe the lifecycle or relationship to sibling session tools, leaving some contextual gaps.

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?

Schema coverage is 100% for the single parameter 'sessionId', which is described as 'Session ID'. The description does not add any additional meaning or format details beyond the schema. Baseline of 3 applies because the schema handles the parameter documentation adequately.

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 action ('resume') and the resource ('previously paused task in a browser session'). It distinguishes this from siblings like pause_session_task, stop_session_task, and terminate_session by specifying that it acts on a paused task. The verb and resource are specific and unambiguous.

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. It does not mention that it should be used after pause_session_task, nor does it exclude cases like already-running tasks. Without this context, an agent may not know the appropriate usage conditions.

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