apply_user_scaffold
Apply a user scaffold (materialize tasks/plans where supported).
This record as markdown: /tools/todos/apply-user-scaffold.md
What apply_user_scaffold does on Todos
AI agents use apply_user_scaffold to create or update resources in Todos, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Todos environment.
Why apply_user_scaffold is rated Medium
This tool creates or modifies data in a reversible way by materializing (instantiating) tasks and plans from a scaffold template. It does not delete data (ruling out Destructive), does not involve financial transactions, does not execute arbitrary code or external operations (ruling out Execute), and does retrieve data (ruling out Read).
From the tool's definition The tool name 'apply_user_scaffold' and description 'Apply a user scaffold (materialize tasks/plans where supported)' indicates it creates or instantiates tasks and plans in the system.
Attacks that exploit this kind of access
The rule that runs apply_user_scaffold safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Todos, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For apply_user_scaffold, this is the rule to start with:
apply_user_scaffold 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 Todos, apply this rule, and every apply_user_scaffold call is checked against it from then on.
Questions about apply_user_scaffold
Apply a user scaffold (materialize tasks/plans where supported). It is categorised as a Write tool in the Todos MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Todos MCP server in PolicyLayer and add a rule for apply_user_scaffold: 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 Todos. Nothing to install.
apply_user_scaffold 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 apply_user_scaffold 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 apply_user_scaffold. 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.
apply_user_scaffold is provided by the Todos MCP server (@hasna/todos). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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