gist-create
Creates a new GitHub gist from one or more files. Returns structured data with gist ID, URL, visibility, file names, description, and file count.
This record as markdown: /tools/io-github-dave-london-http/gist-create.md
What gist-create does on Http
AI agents use gist-create to create or update resources in Http, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Http environment.
Why gist-create is rated Medium
This tool performs a create operation that results in new data being written to GitHub's gist service. While the action is reversible (gists can be deleted), it commits new content to an external system and could have unintended consequences if an AI agent uses it with the wrong files or description. This fits the Write category (creates/modifies data reversibly).
From the tool's definition Tool description states 'Creates a new GitHub gist' which is a create operation that modifies state on GitHub. The tool accepts file content and pushes it to GitHub's gist service, resulting in new data being written to an external system.
Attacks that exploit this kind of access
The rule that runs gist-create safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Http, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For gist-create, this is the rule to start with:
gist-create 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 Http, apply this rule, and every gist-create call is checked against it from then on.
Questions about gist-create
Creates a new GitHub gist from one or more files. Returns structured data with gist ID, URL, visibility, file names, description, and file count. It is categorised as a Write tool in the Http MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Http MCP server in PolicyLayer and add a rule for gist-create: 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 Http. Nothing to install.
gist-create 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 gist-create 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 gist-create. 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.
gist-create is provided by the Http MCP server (@paretools/http). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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