evaluate_watches

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

With no annotations, the description carries full burden but only states the basic action without disclosing behavioral traits. It doesn't cover whether this is read-only, if it requires specific permissions, potential side effects, or how it interacts with session state, which is critical for a debugging 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 front-loads the core action and outcome with zero wasted words, making it easy to parse and understand quickly.

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 of debugging tools and lack of annotations or output schema, the description is insufficient. It doesn't explain what 'watch expressions' are, how results are returned, or error conditions, leaving gaps for an agent to operate effectively in this context.

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%, with the single parameter 'session_id' documented in the schema. The description adds no additional meaning beyond implying evaluation occurs within a session context, so it meets the baseline for high schema coverage without compensating further.

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 ('evaluate') and resource ('all watch expressions'), specifying it returns their current values. It distinguishes from siblings like 'add_watch' or 'remove_watch' by focusing on evaluation rather than modification, though it doesn't explicitly differentiate from 'evaluate' (a sibling tool) which might handle broader expressions.

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. It doesn't mention prerequisites like needing an active session or how it relates to siblings such as 'evaluate' or 'list_watches', leaving the agent to infer usage from context alone.

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