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get_earthquakes

Read-onlyIdempotent

Latest earthquakes from the official USGS global M2.5+ past-week feed, cached hourly and expired within two hours of feed generation. Returns magnitude type, event time, coordinates, source review status and citations. Detection is incomplete; no match never implies safety. Not an early-warning service or independently verified by DatoQA.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNoMaximum recent events returned, default 20; not a complete historical archive.
min_magnitudeNoMinimum reported magnitude within the M2.5+ past-week source feed; default 2.5.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
itemsYes
queryNo
noticeNo
statusYesRead this before using values; a successful transport does not establish data availability.
coverageYes
returnedYesDomain-specific result count, not necessarily the number of stored records in items.
directoryNo
independently_verifiedNoOfficial-source checks are not independent factual corroboration.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • changedOutput schema / properties / coverage / anyOf
      Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "citation": {
-        "additionalProperties": false,
-        "properties": {
-          "publisher": {
-            "type": "string"
-          },
-          "retrieved_at": {
-            "type": "string"
-          },
-          "url": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "url",
-          "publisher",
-          "retrieved_at"
-        ],
-        "type": "object"
-      },
-      "data": {
-        "additionalProperties": {},
-        "description": "Source-specific payload; inspect units, observation dates, nulls and source notes.",
-        "propertyNames": {
-          "type": "string"
-        },
-        "type": "object"
-      },
-      "display_label": {
-        "type": "string"
-      },
-      "domain": {
-        "type": "string"
-      },
-      "freshness": {
-        "additionalProperties": false,
-        "properties": {
-          "age_seconds": {
-            "maximum": 9007199254740991,
-            "minimum": 0,
-            "type": "integer"
-          },
-          "expires_at": {
-            "type": "string"
-          },
-          "meaning": {
-            "type": "string"
-          },
-          "observed_at": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "observed_at",
-          "expires_at",
-          "age_seconds",
-          "meaning"
-        ],
-        "type": "object"
-      },
-      "id": {
-        "type": "string"
-      },
-      "provenance": {
-        "additionalProperties": false,
-        "properties": {
-          "content_sha256": {
-            "type": "string"
-          },
-          "independently_verified": {
-            "const": false,
-            "description": "Official-source checks are not independent factual corroboration.",
-            "type": "boolean"
-          },
-          "license": {
-            "type": "string"
-          },
-          "retrieved_at": {
-            "type": "string"
-          },
-          "source_id": {
-            "type": "string"
-          },
-          "source_name": {
-            "type": "string"
-          },
-          "source_url": {
-            "type": "string"
-          },
-          "valid_until": {
-            "type": "string"
-          },
-          "verification_level": {
-            "enum": [
-              "official_source_and_schema_checked",
-              "method_specific"
-            ],
-            "type": "string"
-          },
-          "verification_method": {
-            "type": "string"
-          },
-          "verification_scope": {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          },
-          "verified_at": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "source_id",
-          "source_name",
-          "source_url",
-          "license",
-          "retrieved_at",
-          "verified_at",
-          "valid_until",
-          "verification_method",
-          "content_sha256",
-          "verification_level",
-          "independently_verified",
-          "verification_scope"
-        ],
-        "type": "object"
-      }
-    },
-    "required": [
-      "id",
-      "domain",
-      "data",
-      "freshness",
-      "citation",
-      "provenance"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "citation": {
+        "additionalProperties": false,
+        "properties": {
+          "publisher": {
+            "type": "string"
+          },
+          "retrieved_at": {
+            "type": "string"
+          },
+          "url": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "url",
+          "publisher",
+          "retrieved_at"
+        ],
+        "type": "object"
+      },
+      "data": {
+        "additionalProperties": {},
+        "description": "Source-specific payload; inspect units, observation dates, nulls and source notes.",
+        "propertyNames": {
+          "type": "string"
+        },
+        "type": "object"
+      },
+      "display_label": {
+        "type": "string"
+      },
+      "domain": {
+        "type": "string"
+      },
+      "freshness": {
+        "additionalProperties": false,
+        "properties": {
+          "age_seconds": {
+            "maximum": 9007199254740991,
+            "minimum": 0,
+            "type": "integer"
+          },
+          "expires_at": {
+            "type": "string"
+          },
+          "meaning": {
+            "type": "string"
+          },
+          "observed_at": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "observed_at",
+          "expires_at",
+          "age_seconds",
+          "meaning"
+        ],
+        "type": "object"
+      },
+      "id": {
+        "type": "string"
+      },
+      "provenance": {
+        "additionalProperties": false,
+        "properties": {
+          "content_sha256": {
+            "type": "string"
+          },
+          "independently_verified": {
+            "const": false,
+            "description": "Official-source checks are not independent factual corroboration.",
+            "type": "boolean"
+          },
+          "license": {
+            "type": "string"
+          },
+          "retrieved_at": {
+            "type": "string"
+          },
+          "source_id": {
+            "type": "string"
+          },
+          "source_name": {
+            "type": "string"
+          },
+          "source_url": {
+            "type": "string"
+          },
+          "valid_until": {
+            "type": "string"
+          },
+          "verification_level": {
+            "enum": [
+              "official_source_and_schema_checked",
+              "public_aggregator_and_schema_checked",
+              "method_specific"
+            ],
+            "type": "string"
+          },
+          "verification_method": {
+            "type": "string"
+          },
+          "verification_scope": {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "verified_at": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "source_id",
+          "source_name",
+          "source_url",
+          "license",
+          "retrieved_at",
+          "verified_at",
+          "valid_until",
+          "verification_method",
+          "content_sha256",
+          "verification_level",
+          "independently_verified",
+          "verification_scope"
+        ],
+        "type": "object"
+      }
+    },
+    "required": [
+      "id",
+      "domain",
+      "data",
+      "freshness",
+      "citation",
+      "provenance"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
    • changedOutput schema / properties / items / items / properties / provenance / properties / verification_level / enum
      Previous value: -[
-  "official_source_and_schema_checked",
-  "method_specific"
-]New value: +[
+  "official_source_and_schema_checked",
+  "public_aggregator_and_schema_checked",
+  "method_specific"
+]
  2. First observed

TDQS

A4.4/5.0
Behavior5/5

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

Annotations only cover the read-only/idempotent safety profile, but the description adds real behavioral context: hourly caching with expiry within two hours of feed generation, source review status, and the critical caveat that detection is incomplete and absence never implies safety. This is exactly the kind of beyond-annotation disclosure the dimension rewards.

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 dense and front-loads the source/scope before caveats, with no filler sentences. Minor redundancy: enumerating returned fields (magnitude type, coordinates, citations) duplicates what the output schema already conveys.

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?

For a two-param read-only feed with an output schema already documenting returns, the description covers everything an agent needs: freshness/staleness semantics, source provenance, magnitude floor, and safety caveats. Nothing material is missing.

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 both parameters are already documented with defaults, bounds, and caveats. The description only reinforces the M2.5+ feed floor implied by min_magnitude and adds no syntax or format detail beyond the schema; baseline 3 applies.

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?

States a specific verb and resource (latest earthquakes) and pins the exact scope: the official USGS global M2.5+ past-week feed. The source and magnitude floor immediately distinguish it from the economic/weather/recall siblings.

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 context and an explicit exclusion ('not an early-warning service or independently verified'), which tells the agent when results are inappropriate. It does not, however, name any alternative tool or describe when another sibling should be preferred instead.

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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