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Chokepoint dependencies by country

get_chokepoint_dependencies
Read-onlyIdempotent

Return country commodity dependencies by chokepoint, where an absent score means insufficient coverage, never zero risk. Returns the highest-scoring country and commodity dependencies for one maritime chokepoint, from the same snapshot as country vulnerabilities; read state and reasons before drawing conclusions.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "chokepoint_id": "<chokepoint_id>"
    },
    "name": "get_chokepoint_dependencies"
  }
}

Input Schema

NameRequiredDescriptionDefault
jmespathNoOptional JMESPath projection applied to the response. See initialize.instructions for grammar and examples.
page_sizeNoMaximum dependencies. Defaults to 25.
chokepoint_idYesCanonical chokepoint id, such as hormuz_strait or malacca_strait.

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changed
    • addedOutput schema / anyOf
      Added value: +[
+  {
+    "properties": {
+      "chokepoint": {
+        "type": "string"
+      },
+      "chokepointId": {
+        "type": "string"
+      },
+      "dependencies": {
+        "items": {
+          "properties": {
+            "band": {
+              "enum": [
+                "",
+                "low",
+                "moderate",
+                "high",
+                "critical"
+              ],
+              "type": "string"
+            },
+            "commodity": {
+              "type": "string"
+            },
+            "commodityId": {
+              "type": "string"
+            },
+            "countryIso2": {
+              "type": "string"
+            },
+            "countryName": {
+              "type": "string"
+            },
+            "methodologyVersion": {
+              "type": "string"
+            },
+            "reasons": {
+              "items": {
+                "enum": [
+                  "missing_source_concentration",
+                  "missing_transit_exposure",
+                  "missing_transit_status",
+                  "stale_source_concentration",
+                  "stale_transit_exposure",
+                  "stale_buffer",
+                  "redistribution_blocked"
+                ],
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "score": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "state": {
+              "enum": [
+                "ok",
+                "stale_input",
+                "insufficient_data"
+              ],
+              "type": "string"
+            },
+            "transitShare": {
+              "type": "number"
+            },
+            "weightedTransitShare": {
+              "type": "number"
+            }
+          },
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "generatedAt": {
+        "type": "string"
+      },
+      "methodologyVersion": {
+        "type": "string"
+      },
+      "upstreamUnavailable": {
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "chokepointId",
+      "chokepoint",
+      "dependencies",
+      "generatedAt",
+      "methodologyVersion",
+      "upstreamUnavailable"
+    ],
+    "type": "object"
+  },
+  {
+    "required": [
+      "projection"
+    ]
+  },
+  {
+    "required": [
+      "data",
+      "_attribution"
+    ]
+  },
+  {
+    "required": [
+      "_budget_exceeded"
+    ]
+  },
+  {
+    "required": [
+      "_jmespath_error"
+    ]
+  }
+]
    • removedOutput schema / properties
      Removed value: -{
-  "chokepoint": {
-    "type": "string"
-  },
-  "chokepointId": {
-    "type": "string"
-  },
-  "dependencies": {
-    "items": {
-      "properties": {
-        "band": {
-          "enum": [
-            "",
-            "low",
-            "moderate",
-            "high",
-            "critical"
-          ],
-          "type": "string"
-        },
-        "commodity": {
-          "type": "string"
-        },
-        "commodityId": {
-          "type": "string"
-        },
-        "countryIso2": {
-          "type": "string"
-        },
-        "countryName": {
-          "type": "string"
-        },
-        "methodologyVersion": {
-          "type": "string"
-        },
-        "reasons": {
-          "items": {
-            "enum": [
-              "missing_source_concentration",
-              "missing_transit_exposure",
-              "missing_transit_status",
-              "stale_source_concentration",
-              "stale_transit_exposure",
-              "stale_buffer",
-              "redistribution_blocked"
-            ],
-            "type": "string"
-          },
-          "type": "array"
-        },
-        "score": {
-          "type": [
-            "number",
-            "null"
-          ]
-        },
-        "state": {
-          "enum": [
-            "ok",
-            "stale_input",
-            "insufficient_data"
-          ],
-          "type": "string"
-        },
-        "transitShare": {
-          "type": "number"
-        },
-        "weightedTransitShare": {
-          "type": "number"
-        }
-      },
-      "type": "object"
-    },
-    "type": "array"
-  },
-  "generatedAt": {
-    "type": "string"
-  },
-  "methodologyVersion": {
-    "type": "string"
-  },
-  "upstreamUnavailable": {
-    "type": "boolean"
-  }
-}
    • removedOutput schema / required
      Removed value: -[
-  "chokepointId",
-  "chokepoint",
-  "dependencies",
-  "generatedAt",
-  "methodologyVersion",
-  "upstreamUnavailable"
-]
  2. Changed1 schema field changed
    • addedInput schema / properties / jmespath
      Added value: +{
+  "description": "Optional JMESPath projection applied to the response. See initialize.instructions for grammar and examples.",
+  "type": "string"
+}
  3. Added

TDQS

A3.7/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare the safe read-only, idempotent profile. The description adds genuinely useful behavioral context beyond that: an absent score means insufficient coverage rather than zero risk, and results share a snapshot with country vulnerabilities. The reference to reading 'state and reasons' hints at richer fields not surfaced in annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, front-loaded with what is returned before the interpretive caveat. No wasted filler, though the first sentence packs both a return statement and a caveat together.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists so return values need not be described. The definition covers the key caveat about absent scores and the snapshot consistency, leaving only minor gaps around explicit sibling routing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents chokepoint_id, page_size, and jmespath fully. The description adds no additional parameter semantics, making the baseline 3 appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource: returns country commodity dependencies for a given maritime chokepoint. Clear what the tool produces, though it does not explicitly contrast itself with siblings like get_chokepoint_status or get_supply_vulnerabilities.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Implies usage through 'from the same snapshot as country vulnerabilities' and 'read state and reasons before drawing conclusions,' suggesting a companion analysis step. However, it gives no explicit when-to-use or when-not-to-use guidance relative to alternatives.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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