timers_operation

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

No annotations are provided, so the description carries the full burden. It mentions the operations but doesn't disclose behavioral traits like whether starting a timer that's already running has any effect, if stopping resets the timer, what happens on reset, or any error conditions. This leaves significant gaps for a mutation tool.

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, efficient sentence that directly states the tool's purpose with no wasted words. It's appropriately sized and front-loaded, making it easy to understand at a glance.

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 no annotations and no output schema, the description is incomplete. It lacks details on behavior, error handling, and output format, and doesn't address sibling tool differentiation. Given the complexity of timer operations and the presence of specific sibling tools, more context is needed.

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 description coverage is 100%, with clear descriptions for both parameters (timerId and operation with enum values). The description adds no additional meaning beyond the schema, such as explaining what a timerId refers to or the implications of each operation. Baseline is 3 since the schema does the heavy lifting.

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 ('perform') and resource ('on a timer'), and specifies the operations (start, stop, reset). However, it doesn't explicitly differentiate from sibling tools like 'timers_start', 'timers_stop', or 'timers_reset', which appear to be more specific versions of these 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 the more specific sibling tools (e.g., timers_start, timers_stop, timers_reset). It also doesn't mention prerequisites, such as whether a timer must exist or be in a certain state, or any context for choosing between operations.

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