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pwndbg_eb

Write space-separated hex bytes to a specified memory address in a debugging session using WinDbg-style syntax.

Instructions

Write hex bytes at address (WinDbg-style).

pwndbg command: eb Source: pwndbg/commands/windbg.py Category: WinDbg

Args: session_id: The UUID of the session. address: Address to write to. data: Space-separated hex bytes (e.g. "90 90 90").

See: https://pwndbg.re/2025.05.30/reference/pwndbg/commands/windbg/

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
session_idYes
addressYes
dataYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

With no annotations, the description carries the full burden. It mentions 'WinDbg-style' but does not disclose behavioral details such as overwrite semantics, address validation, or error handling. The description lacks sufficient transparency 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.

Conciseness4/5

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

The description is concise (16 words plus arg list). It front-loads the purpose and organizes args with brief explanations. The blank line and secondary info (source/category) are minor inefficiencies.

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?

The description covers the core action and main arguments. It does not explain the effect (e.g., if bytes are written to memory or a file) or output behavior. The presence of an output schema (per context) mitigates the need for return value details, but the description could still benefit from more contextual information for an AI agent.

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 0%, so the description must compensate. It explains each parameter: session_id, address, and data (with example format for hex bytes). However, it does not specify address format (e.g., hex or decimal) and could provide more detail on constraints.

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 writes hex bytes at an address, using 'WinDbg-style' for context. It specifies a verb and resource, but does not explicitly distinguish it from sibling write commands like 'pwndbg_ed' or 'pwndbg_eq'.

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

Usage Guidelines2/5

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. There is no mention of prerequisites, limitations, or exclusions.

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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