Generate on-chain transaction payload for BlockWire webhook subscription
Part of the Echorift server.
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AI agents use blockwire_subscribe_prepare_tx to create or modify resources in Echorift. 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 blockwire_subscribe_prepare_tx repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Echorift.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"blockwire_subscribe_prepare_tx": {
"limits": [
{
"counter": "blockwire_subscribe_prepare_tx_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Echorift policy for all 12 tools.
These attack patterns abuse exactly the kind of access blockwire_subscribe_prepare_tx gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Generate on-chain transaction payload for BlockWire webhook subscription. It is categorised as a Write tool in the Echorift MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Echorift MCP server in PolicyLayer and add a rule for blockwire_subscribe_prepare_tx: 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 Echorift. Nothing to install.
blockwire_subscribe_prepare_tx 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 blockwire_subscribe_prepare_tx 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 blockwire_subscribe_prepare_tx. 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.
blockwire_subscribe_prepare_tx is provided by the Echorift MCP server (@echorift/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 12 Echorift tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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