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windbg_heap_block_info

Inspects a heap block’s size, flags, and adjacent memory to reveal overflow context from ASAN crash addresses.

Instructions

Inspect a specific heap block: size, flags, neighbors, memory before/after. Use with ASAN crash addresses to understand overflow context.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
addressYesHeap block address to inspect
Behavior3/5

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

No annotations are provided, so the description carries the burden. It lists what will be inspected, which is useful, but it does not disclose side effects, permissions, or the format/volume of memory before/after. It implies a read-only operation without explicitly stating safety characteristics.

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, front-loaded with the core purpose, and every word adds value. No fluff or redundancy.

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

Completeness4/5

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

With one simple parameter and no output schema, the description adequately covers what the tool does and when to use it. It could detail the return format or the extent of 'memory before/after', but the core intent is clear.

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?

The schema fully documents the single parameter with 100% coverage ('Heap block address to inspect'). The description adds the ASAN crash context but does not add semantic detail beyond the schema. Baseline 3 is appropriate.

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

Purpose5/5

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

The description clearly states the action ('Inspect') and the resource ('a specific heap block') with concrete details (size, flags, neighbors, memory before/after). This distinguishes it from sibling tools like windbg_heap and windbg_heap_neighbors.

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

Usage Guidelines4/5

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

It provides a specific use case: 'Use with ASAN crash addresses to understand overflow context.' This gives clear contextual guidance, though it does not explicitly mention alternatives or when not to use it.

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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