Surgical code extraction from files. Returns ONLY relevant code sections with line numbers — not analysis. OUTPUT: Markdown with extracted code sections (verbatim, with line numbers), minimal annotations, file metadata, latency, token usage. Shows
AI agents call smart_read to retrieve information from HydraMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves data from files without side effects. It performs code extraction and filtering, which are fundamentally read operations. There is no indication of code execution, data modification, deletion, or external operation triggering. The output is informational only.
From the tool's definition Tool description explicitly states 'Surgical code extraction from files' and 'Returns ONLY relevant code sections' — a retrieval operation with no modification or execution.
Documented attack patterns abuse exactly the kind of access smart_read gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and HydraMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for smart_read:
{
"version": "1",
"default": "deny",
"tools": {
"smart_read": {}
}
}smart_read is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Surgical code extraction from files. Returns ONLY relevant code sections with line numbers — not analysis. OUTPUT: Markdown with extracted code sections (verbatim, with line numbers), minimal annotations, file metadata, latency, token usage. Shows. It is categorised as a Read tool in the HydraMCP MCP Server, which means it retrieves data without modifying state.
Register the Hydra MCP server in PolicyLayer and add a rule for smart_read: 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 HydraMCP. Nothing to install.
smart_read 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 smart_read 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 smart_read. 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.
smart_read is provided by the Hydra MCP server (pickle-pixel/hydramcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from HydraMCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
8 HydraMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.