jdwp-mcp

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions 'optionally conditional' but fails to disclose persistence characteristics, performance implications, or what happens if the class is not yet loaded. The condition parameter schema mentions auto-resume behavior, but the main description does not elaborate on execution flow effects.

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?

Extremely efficient at 7 words. Front-loaded with imperative verb ('Set'), zero redundancy, and every token conveys essential information about location format and optional functionality.

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 debugging domain complexity, lack of output schema, and no annotations, the description is minimally adequate but sparse. It omits context about breakpoint persistence across VM events, class loading requirements, and interaction with other debug operations that would be valuable for correct agent usage.

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 75% (3 of 4 parameters described). The description adds valuable syntax context with 'class:line' which helps interpret the 'line' parameter lacking schema documentation. It also signals the optional nature of conditions, complementing the schema descriptions well.

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 ('Set breakpoint'), target location format ('class:line'), and optional capability ('optionally conditional'). However, it does not explicitly differentiate from sibling tools like 'exception_breakpoint' or 'trace' despite the rich debug tool ecosystem.

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?

Provides no guidance on when to use this tool versus alternatives (e.g., exception_breakpoint for exceptions), nor does it mention prerequisites like requiring an active debug session via debug.attach first.

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