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arthas_stack

Retrieve the call stack of a method in a live Java process. Runs in background with optional inline completion or returns a job ID for asynchronous retrieval.

Instructions

Get the call stack of a method. Runs in background; waits up to awaitMs for completion and returns results inline if done, otherwise returns a job ID.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
countNoNumber of stacks (default: 5)
awaitMsNoWait up to this many ms for inline completion (default: 5000; pass 0 for pure async)
timeoutNoTimeout in ms
conditionNoConditional expression
classPatternYesClass name pattern
methodPatternYesMethod name pattern
Behavior4/5

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

No annotations exist, so the description must carry the behavioral burden. It correctly discloses background execution, wait behavior, and result modes. However, it omits potential side effects (likely none for a read tool) and error handling.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences with zero wasted words. The key behavioral detail (async, wait, job ID) is front-loaded.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 6 parameters and no output schema or annotations, the description covers the core async pattern but lacks details on return format, error conditions, and required permissions.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so baseline is 3. The description adds no parameter-specific details beyond what the schema already provides (e.g., purpose of count, condition).

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool gets the call stack of a method, with a specific verb and resource. However, it does not differentiate from sibling tools like trace or monitor, which also involve method inspection.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explains the async behavior and the inline vs job ID result, giving context for when to use. But it provides no guidance on when not to use it or alternatives, such as using synchronous tools for simple queries.

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

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