snow_github_tree
Browse GitHub repository structure via enterprise proxy. Returns metadata only (paths, types, sizes) — no file content in LLM context. Use this to explore a repo before deploying files with snow_github_deploy. Requires: Enterprise license with
This record as markdown: /tools/serac/snow-github-tree.md
What snow_github_tree does on Serac
AI agents call snow_github_tree to retrieve information from Serac without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why snow_github_tree is rated Low
This tool retrieves and queries repository metadata (directory structure, file paths, types, and sizes) without modifying, executing, or deleting any data. It is purely informational to support exploration before deployment operations. No reversible or irreversible changes occur, no code executes, and no financial transactions are involved.
From the tool's definition Tool description states it 'Browse[s] GitHub repository structure' and 'Returns metadata only (paths, types, sizes) — no file content in LLM context.' The explicit statement that it returns only metadata with no side effects clearly indicates a read-only…
Attacks that exploit this kind of access
The rule that runs snow_github_tree safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Serac, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For snow_github_tree, this is the rule to start with:
snow_github_tree 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 Serac, apply this rule, and every snow_github_tree call is checked against it from then on.
Questions about snow_github_tree
Browse GitHub repository structure via enterprise proxy. Returns metadata only (paths, types, sizes) — no file content in LLM context. Use this to explore a repo before deploying files with snow_github_deploy. Requires: Enterprise license with. It is categorised as a Read tool in the Serac MCP Server, which means it retrieves data without modifying state.
Register the Serac MCP server in PolicyLayer and add a rule for snow_github_tree: 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 Serac. Nothing to install.
snow_github_tree 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 snow_github_tree 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 snow_github_tree. 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.
snow_github_tree is provided by the Serac MCP server (serac-labs/serac). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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