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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
    • changedInput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • changedOutput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
  2. 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"
+]
  3. First observed

TDQS

A3.9/5.0
Behavior4/5

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

Annotations already declare the safe read-only, idempotent, non-destructive profile, but the description adds genuinely new behavior: hourly caching, expiry within two hours of feed generation, and the incompleteness caveat that 'no match never implies safety.' The listed return fields overlap with the existing output schema, so it falls short of a 5.

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?

Three front-loaded sentences with the source and scope stated first, then freshness, then caveats. The enumeration of return fields is somewhat redundant given the output schema, but nothing is padded.

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?

For a two-optional-parameter read tool with annotations and an output schema, the description covers source, freshness, and safety caveats an agent needs. Return-value detail is redundant because an output schema exists, and no alternative-tool routing is offered.

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 coverage is 100% and both parameters carry their own descriptions including defaults and bounds, so the schema does the heavy lifting. The description adds no format or syntax detail beyond it, making the baseline 3 correct.

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 resource, source, and scope: 'Latest earthquakes from the official USGS global M2.5+ past-week feed.' An agent immediately knows this returns recent seismic events from a named authoritative feed, which is unmistakably distinct from every economic/weather sibling.

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?

It carves out an explicit misuse case ('not an early-warning service') and warns that detection is incomplete, which guides interpretation. However, it never states when to prefer this tool over alternatives, because no sibling covers seismic data, so selection guidance is only implied.

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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