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lean_ctx_server/tools/registered/
ctx_discover_tools.rs

1// SPDX-License-Identifier: Apache-2.0
2use rmcp::ErrorData;
3use rmcp::model::Tool;
4use serde_json::{Map, Value, json};
5
6use crate::server::tool_trait::{McpTool, ToolContext, ToolOutput, get_str};
7use lean_ctx::tool_defs::tool_def;
8
9pub struct CtxDiscoverToolsTool;
10
11impl McpTool for CtxDiscoverToolsTool {
12    fn name(&self) -> &'static str {
13        "ctx_discover_tools"
14    }
15
16    fn tool_def(&self) -> Tool {
17        tool_def(
18            "ctx_discover_tools",
19            "WORKFLOW: call FIRST when unsure which tool fits your task — lists all tools on empty query.\n\
20             Then use ctx_call to invoke discovered tools (for static-tool-list clients).\n\
21             ANTIPATTERN: not for runtime invocation — use ctx_call(name=..., arguments=...) directly.",
22            json!({
23                "type": "object",
24                "properties": {
25                    "query": { "type": "string", "description": "Search keyword (empty returns all)" }
26                }
27            }),
28        )
29    }
30
31    fn handle(
32        &self,
33        args: &Map<String, Value>,
34        _ctx: &ToolContext,
35    ) -> Result<ToolOutput, ErrorData> {
36        let query = get_str(args, "query").unwrap_or_default();
37        let result = lean_ctx::tool_defs::discover_tools(&query);
38        Ok(ToolOutput::simple(result))
39    }
40}