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okenjioxx

Roblox Executor MCP Server

by okenjioxx

Spy on outgoing RakNet packets

packet-spy
Destructive

Install a RakNet send hook to capture outgoing low-level client packets; fetch size, priority, reliability, channel, and hex preview, then stop to remove the hook.

Instructions

WRITES LIVE GAME STATE — installs a RakNet send hook. Captures every OUTGOING low-level packet the client sends (RakNet only exposes outgoing traffic). For each packet it records Size, Priority, Reliability, OrderingChannel, and a hex preview of the payload. action='start' installs the hook (idempotent), 'fetch' returns the captured packets newest-first without stopping, 'stop' removes the hook and clears the buffer. Requires the raknet library. WARNING: packet-level interception is risky and can disconnect or flag the client — stop when done. Signature: { action: "start" | "fetch" | "stop", limit: any?, previewBytes: any?, threadContext: number? }. Phase: act; cost=medium; idempotency=contextual-write. Requires: active-client, explicit-mutation-approval. Capabilities: RakNet packet APIs. Produces: bounded-event-snapshot. Verify with: assert-state. Safety: MUTATING; performs external network or socket I/O. On failure: inspect tool-schema for exact fields, defaults, constraints, and an invocation example.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNoMax packets to return on fetch (default 100, newest-first).
actionYes'start' installs the send hook; 'fetch' returns captured packets; 'stop' removes the hook.
previewBytesNoHow many payload bytes to include as a hex preview per packet (default 64).
threadContextNoOptional Roblox thread identity for this call; omit it to use the server default.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv2.0.0-spies.2

TDQS

A4.4/5.0
Behavior5/5

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

Far exceeds the annotations: it discloses that start installs a hook, fetch is non-destructive to the buffer, stop removes the hook and CLEARS the buffer, requires the `raknet` library, and that interception is risky and can disconnect/flag the client. This is exactly the kind of consequence-level detail the destructiveHint annotation cannot convey. The only nuance is that 'start ... (idempotent)' sits in mild tension with tool-level idempotentHint=false, but the qualifier is action-specific and the overall non-idempotent reading holds.

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?

Front-loads the most important fact ('WRITES LIVE GAME STATE') and stays dense, but the trailing metadata boilerplate (Signature, Phase, Capabilities, Produces, Verify, Safety) partially duplicates the schema and annotations. Efficient overall, with a little redundancy.

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

Completeness5/5

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

For a 4-parameter mutating tool with no output schema, it covers everything an agent needs: the three actions and their side effects, buffer-clearing behavior, the returned packet fields, the library dependency, and the risk warning. Nothing material to correct invocation is missing.

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 description coverage is 100%, so the schema already documents action, limit, previewBytes, and threadContext. The description's signature block largely restates the schema and adds no format, default, or constraint detail beyond it, so the baseline 3 applies.

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?

States a specific verb and resource: installs a RakNet send hook and captures every OUTGOING low-level packet, enumerating exactly what is recorded (Size, Priority, Reliability, OrderingChannel, hex preview). This cleanly distinguishes it from higher-level siblings like get-remote-spy-logs, trace-remote-traffic, send-packet, and block-packets without needing to open any schema.

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?

Gives clear context: 'RakNet only exposes outgoing traffic' scopes what it can see, and the WARNING plus 'stop when done' tells the agent the right lifecycle. However it never names an alternative tool (e.g. remote-level spies) or an explicit when-not condition, so routing between it and its siblings is left partly to inference.

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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