Verify the trade outcome on-chain after execution. Reads the Pyth price feed to confirm the market has resolved, validates staleness and confidence, then transitions the settlement from Executed → PostChecked. Must be called after executeTrade and before settle.
Part of the Agentvault MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use postCheck to create or modify resources in Agentvault. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call postCheck repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Agentvault.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
postCheck:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full Agentvault policy for all 11 tools.
Agents calling write-class tools like postCheck have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Verify the trade outcome on-chain after execution. Reads the Pyth price feed to confirm the market has resolved, validates staleness and confidence, then transitions the settlement from Executed → PostChecked. Must be called after executeTrade and before settle.. It is categorised as a Write tool in the Agentvault MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Add a rule in your Intercept YAML policy under the tools section for postCheck. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Agentvault MCP server.
postCheck 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 postCheck rule in your Intercept 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 Intercept policy for postCheck. 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.
postCheck is provided by the Agentvault MCP server (agentvault-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.