config
Manages git configuration values. Supports get, set, list, and unset actions. Operates at local, global, system, or worktree scope.
This record as markdown: /tools/io-github-dave-london-build/config.md
What config does on Build
AI agents use config to create or update resources in Build, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Build environment.
Why config is rated Medium
The tool performs reversible modifications to git configuration (set/unset operations). While 'get' and 'list' are read-only, the presence of 'set' and 'unset' capabilities means it can create or modify configuration state. This is Write rather than Destructive because git config changes are typically reversible (previous values can be restored).
From the tool's definition Tool description states it 'Supports get, set, list, and unset actions' with explicit mention of 'set' and 'unset' operations that modify git configuration values.
Attacks that exploit this kind of access
The rule that runs config safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Build, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For config, this is the rule to start with:
config stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Build, apply this rule, and every config call is checked against it from then on.
Questions about config
Manages git configuration values. Supports get, set, list, and unset actions. Operates at local, global, system, or worktree scope. It is categorised as a Write tool in the Build MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Build MCP server in PolicyLayer and add a rule for config: 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 Build. Nothing to install.
config is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the config 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 config. 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.
config is provided by the Build MCP server (Dave-London/Pare). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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