// MCP TOOL REFERENCE

unpack_sources

Admin/system-level operation

Part of the Source Map Parser MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

// WHEN AI AGENTS USE THIS TOOL

AI agents invoke unpack_sources to trigger processes or run actions in Source Map Parser. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.

// WHY ENFORCE A POLICY ON UNPACK_SOURCES

unpack_sources can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. Intercept enforces rate limits and validates arguments to keep execution within safe bounds.

// RECOMMENDED POLICY

Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.

io-github-masonchow-source-map-parser-mcp.yaml

tools:
  unpack_sources:
    rules:
      - action: allow
        rate_limit:
          max: 10
          window: 60
        validate:
          required_args: true

See the full Source Map Parser policy for all 3 tools.

// DETAILS

Tool Name unpack_sources

Category Execute

MCP Server Source Map Parser MCP Server

Risk Level High

// MORE SOURCE MAP PARSER TOOLS

Execute parse_stack Read lookup_context

// WHAT CAN GO WRONG

Agents calling execute-class tools like unpack_sources have been implicated in these attack patterns. Read the full case and prevention policy for each:

Browse the full MCP Attack Database →

// OTHER EXECUTE TOOLS ACROSS MCP SERVERS

Other tools in the Execute risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.

Agent Passport System — Cryptographic Identity for AI Agents commerce_preflight Agent Passport System — Cryptographic Identity for AI Agents execute_with_context Agent Passport System — Cryptographic Identity for AI Agents gateway_execute_approval Agent Passport System — Cryptographic Identity for AI Agents governance_360 Agent Passport System — Cryptographic Identity for AI Agents parse_governance_block_html AgentClear — API Marketplace for AI Agents call_service

// IN CONTEXT OF HIGH RISK

unpack_sources is one of the high-risk operations in Source Map Parser. For the full severity-focused view — only the high-risk tools with their recommended policies — see the breakdown for this server, or browse all high-risk tools across every MCP server.

// RELATED READING

// FAQ

What does the unpack_sources tool do? +

# Unpack Source Map Sources This tool extracts all source files and their content from a source map. ## Parameters: - **sourceMapUrl**: The URL of the source map file to unpack ## Returns: - A JSON object containing: - **sources**: Object with source file paths as keys and their content as values - **sourceRoot**: The source root path from the source map - **file**: The original file name - **totalSources**: Total number of source files found . It is categorised as a Execute tool in the Source Map Parser MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on unpack_sources? +

Add a rule in your Intercept YAML policy under the tools section for unpack_sources. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Source Map Parser MCP server.

What risk level is unpack_sources? +

unpack_sources is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit unpack_sources? +

Yes. Add a rate_limit block to the unpack_sources rule in your Intercept 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.

How do I block unpack_sources completely? +

Set action: deny in the Intercept policy for unpack_sources. 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.

What MCP server provides unpack_sources? +

unpack_sources is provided by the Source Map Parser MCP server (source-map-parser-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

unpack_sources

Enforce policies on Source Map Parser