fix(mcp): analyze_bandar lists the tiers top accepts

The schema said uint8 0-255; only 1, 3, 5 and 10 are valid.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V3syn2fN2LNo5pvTSqc6eh

crates/idx-mcp/src/params.rs

@@ -1,6 +1,7 @@
 //! Tool inputs. String enums are validated by idx-core's `FromStr`, so the
 //! accepted values and error messages match the CLI; the schemas list them.
 
+use idx_core::analysis::bandar::TIERS;
 use idx_core::api::types::{Interval, Period};
 use idx_core::broker::types::{BrokerBoard, BrokerInvestor};
 use idx_core::flow::types::FlowSource;
@@ -155,6 +156,7 @@ pub struct BandarParams {
     pub scope: BrokerScope,
     /// Tier behind the headline signal: 1, 3, 5 or 10 brokers per side (default 5).
     #[serde(default)]
+    #[schemars(schema_with = "top_schema")]
     pub top: Option<u8>,
 }
 
@@ -255,3 +257,7 @@ fn board_schema(_: &mut SchemaGenerator) -> Schema {
 fn flow_source_schema(_: &mut SchemaGenerator) -> Schema {
     string_enum(FlowSource::ALL.map(FlowSource::as_str).to_vec())
 }
+
+fn top_schema(_: &mut SchemaGenerator) -> Schema {
+    json_schema!({ "type": "integer", "enum": TIERS })
+}

crates/idx-mcp/tests/golden/tools.json

@@ -59,13 +59,13 @@
         "top": {
           "default": null,
           "description": "Tier behind the headline signal: 1, 3, 5 or 10 brokers per side (default 5).",
-          "format": "uint8",
-          "maximum": 255,
-          "minimum": 0,
-          "type": [
-            "integer",
-            "null"
-          ]
+          "enum": [
+            1,
+            3,
+            5,
+            10
+          ],
+          "type": "integer"
         }
       },
       "required": [