Sets specific values of a single card. Use with caution. Returns list of booleans indicating success for each key.
AI agents use setSpecificValueOfCard to create or update resources in Anki — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Anki environment.
This tool modifies card properties (such as review history, intervals, or flags) but does not irreversibly delete data or destroy records. The changes are reversible through subsequent setSpecificValueOfCard calls or Anki's undo functionality. While it affects user data integrity and could disrupt study progress if misused, it falls short of Destructive (which requires irreversible deletion).
From the tool's definition Tool description states 'Sets specific values of a single card' which directly indicates modification of existing data. The caution warning 'Use with caution' reflects the potential for unintended changes to study data.
Documented attack patterns abuse exactly the kind of access setSpecificValueOfCard gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Anki, and nothing reaches the server without passing your rules. This is the rule we recommend for setSpecificValueOfCard:
{
"version": "1",
"default": "deny",
"tools": {
"setSpecificValueOfCard": {
"limits": [
{
"counter": "setspecificvalueofcard_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}setSpecificValueOfCard 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.
Free to start. No card required.
Sets specific values of a single card. Use with caution. Returns list of booleans indicating success for each key. It is categorised as a Write tool in the Anki MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Anki MCP server in PolicyLayer and add a rule for setSpecificValueOfCard: 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 Anki. Nothing to install.
setSpecificValueOfCard 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 setSpecificValueOfCard 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 setSpecificValueOfCard. 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.
setSpecificValueOfCard is provided by the Anki MCP server (ujisati/anki-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Anki, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
40 Anki tools catalogued and risk-classified — across an index of 43,000+ MCP servers.