Authenticate with the server using the configured secret. Required before other tools when MCP_CLIENT_SECRET is set.
AI agents use handshake to create or update resources in Code-Index-MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Code-Index-MCP environment.
An AI agent can call handshake faster than any human can review — one bad instruction and it creates or modifies resources in Code-Index-MCP by the hundred, each call as confident as the last.
Documented attack patterns abuse exactly the kind of access handshake gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Code-Index-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for handshake:
{
"version": "1",
"default": "deny",
"tools": {
"handshake": {
"limits": [
{
"counter": "handshake_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}handshake 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.
Authenticate with the server using the configured secret. Required before other tools when MCP_CLIENT_SECRET is set. It is categorised as a Write tool in the Code-Index-MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Code-Index- MCP server in PolicyLayer and add a rule for handshake: 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 Code-Index-MCP. Nothing to install.
handshake 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 handshake 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 handshake. 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.
handshake is provided by the Code-Index- MCP server (viperjuice/code-index-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 Code-Index-MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
8 Code-Index-MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.