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us-drought-monitor-mcp-server

by io.github.cyanheads
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Get a drought severity snapshot

drought_get_current_severity
Read-onlyIdempotent

Get current or dated drought severity, cumulative and categorical area percentages, area square miles, supported population counts and experimental upstream DSCI. Resolve identifiers with drought_list_reference. DSCI changes use exactly 4 and 52 weeks earlier; missing observations remain null. US selects both CONUS and Total.

Input Schema

NameRequiredDescriptionDefault
areaYesOne exact geography selector.
dateNoCalendar date YYYY-MM-DD; defaults to latest published map.

Output Schema

NameRequiredDescriptionDefault
errorNoPresent when the call failed. Absent on success.
foundNoAt least one complete severity snapshot exists.
noticeNoMissing observation guidance.
guidanceNoMissing-data or coverage guidance.
snapshotsNoComplete required severity components for each area.
provenanceNoActual sources and attribution.
availableFromNoFirst published map.
latestMapDateNoLatest actually published map.
requestedAreaNoOriginal selector.
requestedDateNoRequested date, or null for latest.
resolvedAreasNoResolved canonical areas.
effectiveMapDateNoContaining Tuesday.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed7 schema fields changed
    • changedInput schema / properties / area / oneOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "description": "National coverage selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "us",
-        "description": "National geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact state selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "state",
-        "description": "State geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact county selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "county",
-        "description": "County geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact tribal selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "tribal",
-        "description": "Tribal geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact climate division selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "climate_division",
-        "description": "Climate division geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact watershed selector with matching HUC width.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "huc",
-        "description": "Watershed geography.",
-        "type": "string"
-      },
-      "hucLevel": {
-        "anyOf": [
-          {
-            "const": 2,
-            "type": "number"
-          },
-          {
-            "const": 4,
-            "type": "number"
-          },
-          {
-            "const": 6,
-            "type": "number"
-          },
-          {
-            "const": 8,
-            "type": "number"
-          }
-        ],
-        "description": "Exact HUC identifier width."
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi",
-      "hucLevel"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "description": "National coverage selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "us",
+        "description": "National geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact state selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "state",
+        "description": "State geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact county selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "county",
+        "description": "County geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact tribal selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "tribal",
+        "description": "Tribal geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact climate division selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "climate_division",
+        "description": "Climate division geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Bundled RFC code or exact name.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "river_forecast_center",
+        "description": "River Forecast Center geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact watershed selector with matching HUC width.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "huc",
+        "description": "Watershed geography.",
+        "type": "string"
+      },
+      "hucLevel": {
+        "anyOf": [
+          {
+            "const": 2,
+            "type": "number"
+          },
+          {
+            "const": 4,
+            "type": "number"
+          },
+          {
+            "const": 6,
+            "type": "number"
+          },
+          {
+            "const": 8,
+            "type": "number"
+          }
+        ],
+        "description": "Exact HUC identifier width."
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi",
+      "hucLevel"
+    ],
+    "type": "object"
+  }
+]
    • changedOutput schema / properties / error / properties / data / properties / reason / description
      Previous value: -"Machine-readable failure mode. Declared by this tool: `upstream_request_rejected`: USDM rejects a selector or date request. `ambiguous_area`: Several exact names match. `unknown_area`: A geography name cannot resolve. `invalid_area`: Identifier shape is invalid. `invalid_date_range`: The date is not a real calendar date. `publication_unavailable`: No latest publication is available. `upstream_shape_invalid`: Upstream data is malformed, duplicate or outside scope. `dataset_too_large`: The complete snapshot exceeds bounded response budgets. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `upstream_request_rejected`: USDM rejects a selector or date request. `ambiguous_area`: Several exact names match. `unknown_area`: A geography name cannot resolve. `invalid_area`: Identifier shape is invalid. `invalid_date_range`: The date is not a real calendar date. `publication_unavailable`: No latest publication is available. `upstream_shape_invalid`: Upstream data is malformed, duplicate or outside scope. `dataset_too_large`: The complete snapshot exceeds acquisition or normalized-data quotas. Other values are possible when a failure originates below the handler."
    • addedOutput schema / properties / provenance / properties / populationInterpretation
      Added value: +{
+  "additionalProperties": false,
+  "description": "Present when the workflow includes a supported population metric.",
+  "properties": {
+    "caveat": {
+      "description": "Population assumptions and precision limitations.",
+      "type": "string"
+    },
+    "methodologyUrl": {
+      "description": "Official population estimation methodology.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "methodologyUrl",
+    "caveat"
+  ],
+  "type": "object"
+}
    • changedOutput schema / properties / requestedArea / oneOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "description": "National coverage selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "us",
-        "description": "National geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact state selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "state",
-        "description": "State geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact county selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "county",
-        "description": "County geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact tribal selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "tribal",
-        "description": "Tribal geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact climate division selector.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "climate_division",
-        "description": "Climate division geography.",
-        "type": "string"
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "Exact watershed selector with matching HUC width.",
-    "properties": {
-      "aoi": {
-        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
-        "maxLength": 200,
-        "minLength": 1,
-        "type": "string"
-      },
-      "areaType": {
-        "const": "huc",
-        "description": "Watershed geography.",
-        "type": "string"
-      },
-      "hucLevel": {
-        "anyOf": [
-          {
-            "const": 2,
-            "type": "number"
-          },
-          {
-            "const": 4,
-            "type": "number"
-          },
-          {
-            "const": 6,
-            "type": "number"
-          },
-          {
-            "const": 8,
-            "type": "number"
-          }
-        ],
-        "description": "Exact HUC identifier width."
-      }
-    },
-    "required": [
-      "areaType",
-      "aoi",
-      "hucLevel"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "description": "National coverage selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "us",
+        "description": "National geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact state selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "state",
+        "description": "State geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact county selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "county",
+        "description": "County geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact tribal selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "tribal",
+        "description": "Tribal geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact climate division selector.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "climate_division",
+        "description": "Climate division geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Bundled RFC code or exact name.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "river_forecast_center",
+        "description": "River Forecast Center geography.",
+        "type": "string"
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "Exact watershed selector with matching HUC width.",
+    "properties": {
+      "aoi": {
+        "description": "Exact geography identifier or state name; county names require a state and resolve exact names before unique suffix-free aliases.",
+        "maxLength": 200,
+        "minLength": 1,
+        "type": "string"
+      },
+      "areaType": {
+        "const": "huc",
+        "description": "Watershed geography.",
+        "type": "string"
+      },
+      "hucLevel": {
+        "anyOf": [
+          {
+            "const": 2,
+            "type": "number"
+          },
+          {
+            "const": 4,
+            "type": "number"
+          },
+          {
+            "const": 6,
+            "type": "number"
+          },
+          {
+            "const": 8,
+            "type": "number"
+          }
+        ],
+        "description": "Exact HUC identifier width."
+      }
+    },
+    "required": [
+      "areaType",
+      "aoi",
+      "hucLevel"
+    ],
+    "type": "object"
+  }
+]
    • changedOutput schema / properties / resolvedAreas / items / properties / areaType / enum
      Previous value: -[
-  "us",
-  "state",
-  "county",
-  "huc",
-  "tribal",
-  "climate_division"
-]New value: +[
+  "us",
+  "state",
+  "county",
+  "huc",
+  "tribal",
+  "climate_division",
+  "river_forecast_center"
+]
    • changedOutput schema / properties / snapshots / items / properties / areaType / enum
      Previous value: -[
-  "us",
-  "state",
-  "county",
-  "huc",
-  "tribal",
-  "climate_division"
-]New value: +[
+  "us",
+  "state",
+  "county",
+  "huc",
+  "tribal",
+  "climate_division",
+  "river_forecast_center"
+]
    • changedOutput schema / properties / snapshots / items / properties / populationCountCumulative / description
      Previous value: -"Cumulative population in people, or null."New value: +"Cumulative population estimates in people, or null; see provenance.populationInterpretation."
  2. First observed

TDQS

A4.4/5.0
Behavior4/5

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

The annotations already establish read-only, idempotent, open-world behavior, and the description adds useful data semantics: missing observations remain null and DSCI changes use exactly 4- and 52-week comparison windows. It does not discuss auth, rate limits, or return structure, but the output schema covers return shape.

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?

The description is front-loaded with the core purpose and returned data, followed by identifier and aggregation notes. It is dense but efficient; each sentence carries useful meaning, though the output-measure enumeration is somewhat packed.

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

Completeness5/5

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

Given the complex oneOf area selector, rich schema coverage, annotations, and an output schema, the description is complete enough for an agent to call the tool correctly. It covers the key non-schema behaviors: identifier resolution, null handling, DSCI timing, and US aggregation.

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

Parameters4/5

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

Schema coverage is 100%, so the schema already documents area selectors and date formatting. The description adds meaning beyond the schema by noting that US selects both CONUS and Total and by directing identifier resolution through drought_list_reference.

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

Purpose5/5

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

The description states a specific verb and resource: get drought severity as a current or dated snapshot. It enumerates the returned measures and distinguishes the snapshot use case from time-series or comparison siblings by naming the identifier helper explicitly.

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

Usage Guidelines4/5

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

It gives clear usage context by saying identifiers should be resolved with drought_list_reference and clarifies that US selects both CONUS and Total. It does not explicitly exclude or compare against drought_get_timeseries or drought_compare_areas, so it stops short of full when-to-use guidance.

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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Glama MCP Gateway

Add one secure layer between your agents and this server.

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