Skip to main content
Glama

pwndbg_nextsyscall

Pauses execution at the next syscall instruction, bypassing branches. Simplifies tracing system calls during binary analysis.

Instructions

Break at the next syscall instruction (without taking branches).

pwndbg command: nextsyscall (alias: nextsc) Source: pwndbg/commands/next.py Category: Step/Next/Continue

Args: session_id: The UUID of the session. timeout: Maximum seconds to wait (default 30).

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

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
session_idYes
timeoutNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are provided, so the description bears full burden. It only mentions breaking at the next syscall without branches. It does not disclose error handling, timeout behavior, session prerequisites, or return values.

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 compact with a clear purpose line, parameter list, and reference. However, the inclusion of a URL and source file path may be extraneous for an AI agent, slightly reducing conciseness.

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?

With an existing output schema, return value details are not needed. However, the description lacks context on prerequisites (e.g., active session) and error scenarios, which would be helpful for a debugging tool.

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

Parameters4/5

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

Schema description coverage is 0%, but the description adds meaningful explanations for both parameters: 'The UUID of the session' for session_id and 'Maximum seconds to wait (default 30)' for timeout, which the schema lacks.

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 tool breaks at the next syscall instruction without taking branches. It uses a specific verb (break) and resource (next syscall instruction), and the parenthetical distinguishes it from siblings like pwndbg_nextcall.

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 implies usage through the category 'Step/Next/Continue' and mentions it's a pwndbg command, but does not explicitly state when to use this over alternatives or provide exclusion criteria.

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

Install Server

Other Tools

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/Micro-Evaluation-Group/pwndbg-lldb-mcp'

If you have feedback or need assistance with the MCP directory API, please join our Discord server