toon_decode
Convert TOON (Token-Oriented Object Notation) string back to JSON. Use this to parse TOON-encoded data from other agents, tool responses with --toon flag, or any TOON-formatted content. Returns standard JSON that can be used with any tool.
This record as markdown: /tools/io-github-homenshum-nodebench/toon-decode.md
What toon_decode does on Nodebench
AI agents call toon_decode to retrieve information from Nodebench without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why toon_decode is rated Low
This tool takes serialized input (TOON-formatted data) and deserializes it to JSON format. It is a pure transformation operation with no side effects—no data is created, modified, deleted, or executed. The tool merely reads and reformats data, making it a Read category tool with low severity since format conversion alone poses minimal risk.
From the tool's definition Tool name 'toon_decode' and description states it 'Convert[s] TOON...string back to JSON' and 'Returns standard JSON'. The verb 'parse' and 'convert' indicate data retrieval/transformation with no modification to underlying state.
Attacks that exploit this kind of access
The rule that runs toon_decode safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Nodebench, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For toon_decode, this is the rule to start with:
toon_decode is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Nodebench, apply this rule, and every toon_decode call is checked against it from then on.
Questions about toon_decode
Convert TOON (Token-Oriented Object Notation) string back to JSON. Use this to parse TOON-encoded data from other agents, tool responses with --toon flag, or any TOON-formatted content. Returns standard JSON that can be used with any tool. It is categorised as a Read tool in the Nodebench MCP Server, which means it retrieves data without modifying state.
Register the Nodebench MCP server in PolicyLayer and add a rule for toon_decode: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Nodebench. Nothing to install.
toon_decode is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the toon_decode rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for toon_decode. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
toon_decode is provided by the Nodebench MCP server (nodebench-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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