Use when the agent suspects the code it's about to write uses a deprecated API — e.g. tokio::Runtime::new() (now tokio::runtime::Runtime::new()), chrono::DateTime::from_str (now feature-gated), or any path that points to a yanked or RustSec-advisory'd crate version. The substrate returns the curr...
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AI agents call find_modern_equivalent to retrieve information from Codeitall without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though find_modern_equivalent only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"find_modern_equivalent": {}
}
}See the full Codeitall policy for all 8 tools.
These attack patterns abuse exactly the kind of access find_modern_equivalent gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Use when the agent suspects the code it's about to write uses a deprecated API — e.g. tokio::Runtime::new() (now tokio::runtime::Runtime::new()), chrono::DateTime::from_str (now feature-gated), or any path that points to a yanked or RustSec-advisory'd crate version. The substrate returns the current canonical alternative with a behavior summary if probed, and surfaces yank-status / advisory rows verbatim. For TypeScript/Next.js pass language='ts' with a deprecated Next.js API — e.g. next/router (now next/navigation), getServerSideProps (now an async Server Component), @next/font (now next/font), next/legacy/image (now next/image) — and the substrate returns the modern equivalent with the official upgrade-guide citation and how prevalent the deprecated vs modern form is across the live Next.js corpus.. It is categorised as a Read tool in the Codeitall MCP Server, which means it retrieves data without modifying state.
Register the Codeitall MCP server in PolicyLayer and add a rule for find_modern_equivalent: 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 Codeitall. Nothing to install.
find_modern_equivalent is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the find_modern_equivalent 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 find_modern_equivalent. 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.
find_modern_equivalent is provided by the Codeitall MCP server (https://api.codeitall.dev/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 Codeitall tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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