ContrastAPI

Get CVSS Details

get_cvss_details

Read-onlyIdempotent

Parse a CVSS v3.x vector string into a per-metric breakdown plus a recomputed base score. Returns the canonicalized vector, version (3.0 or 3.1), base_score, base_severity (NONE/LOW/MEDIUM/HIGH/CRITICAL), and the eight base metrics: attack_vector (NETWORK/ADJACENT_NETWORK/LOCAL/PHYSICAL), attack_complexity (LOW/HIGH), privileges_required (NONE/LOW/HIGH), user_interaction (NONE/REQUIRED), scope (UNCHANGED/CHANGED), and the three impact metrics confidentiality_impact / integrity_impact / availability_impact (NONE/LOW/HIGH each). When temporal/environmental metrics are explicit in the vector, temporal_score and environmental_score are populated separately. Use to translate raw CVSS strings into agent-friendly attributes without re-parsing the vector grammar yourself, and to verify upstream NVD scoring against the recomputed value. v2 vectors (AV:N/AC:L/Au:N/...) are rejected with 400 — read cvss_v2_vector from cve_lookup if you need v2 detail. Free: 30/hr, Pro: 500/hr. Returns {version, vector, base_score, base_severity, metrics: {attack_vector, attack_complexity, privileges_required, user_interaction, scope, confidentiality_impact, integrity_impact, availability_impact}, temporal_score, environmental_score, summary, verdict}.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`vector`	Yes	CVSS v3.0 or v3.1 vector string, e.g. 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'. v2 vectors are rejected — use the cvss_v2_vector field on cve_lookup if you need v2.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed4 schema fields changedJun 2, 2026
- changedOutput schema / properties / result / properties / environmental_score / type
```
Previous value: -"number"New value: +[
+  "number",
+  "null"
+]
```
- changedOutput schema / properties / result / properties / next_calls / type
```
Previous value: -"array"New value: +[
+  "array",
+  "null"
+]
```
- changedOutput schema / properties / result / properties / temporal_score / type
```
Previous value: -"number"New value: +[
+  "number",
+  "null"
+]
```
- changedOutput schema / properties / result / properties / verdict / type
```
Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
```
Changed3 schema fields changedMay 25, 2026
- changedOutput schema / properties / result / properties / environmental_score / type
```
Previous value: -"object"New value: +"number"
```
- changedOutput schema / properties / result / properties / next_calls / type
```
Previous value: -"object"New value: +"array"
```
- changedOutput schema / properties / result / properties / temporal_score / type
```
Previous value: -"object"New value: +"number"
```

Changed1 schema field changedMay 22, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "result": {
+      "properties": {
+        "base_score": {
+          "type": "number"
+        },
+        "base_severity": {
+          "type": "string"
+        },
+        "environmental_score": {
+          "type": "object"
+        },
+        "metrics": {
+          "type": "object"
+        },
+        "next_calls": {
+          "type": "object"
+        },
+        "summary": {
+          "type": "string"
+        },
+        "temporal_score": {
+          "type": "object"
+        },
+        "vector": {
+          "type": "string"
+        },
+        "verdict": {
+          "type": "object"
+        },
+        "version": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "version",
+        "vector",
+        "base_score",
+        "base_severity",
+        "metrics",
+        "summary"
+      ],
+      "type": "object"
+    }
+  },
+  "required": [
+    "result"
+  ],
+  "type": "object"
+}

Changed1 schema field changedMay 22, 2026

changedOutput schema / (root)

Previous value: -{
-  "$defs": {
-    "CvssDetailsResponse": {
-      "properties": {
-        "base_score": {
-          "type": "number"
-        },
-        "base_severity": {
-          "type": "string"
-        },
-        "environmental_score": {
-          "anyOf": [
-            {
-              "type": "number"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "metrics": {
-          "$ref": "#/$defs/CvssMetrics"
-        },
-        "next_calls": {
-          "anyOf": [
-            {
-              "items": {
-                "$ref": "#/$defs/PivotHint"
-              },
-              "type": "array"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "summary": {
-          "type": "string"
-        },
-        "temporal_score": {
-          "anyOf": [
-            {
-              "type": "number"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "vector": {
-          "type": "string"
-        },
-        "verdict": {
-          "anyOf": [
-            {
-              "$ref": "#/$defs/Verdict"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "version": {
-          "type": "string"
-        }
-      },
-      "required": [
-        "version",
-        "vector",
-        "base_score",
-        "base_severity",
-        "metrics",
-        "summary"
-      ],
-      "type": "object"
-    },
-    "CvssMetrics": {
-      "properties": {
-        "attack_complexity": {
-          "type": "string"
-        },
-        "attack_vector": {
-          "type": "string"
-        },
-        "availability_impact": {
-          "type": "string"
-        },
-        "confidentiality_impact": {
-          "type": "string"
-        },
-        "integrity_impact": {
-          "type": "string"
-        },
-        "privileges_required": {
-          "type": "string"
-        },
-        "scope": {
-          "type": "string"
-        },
-        "user_interaction": {
-          "type": "string"
-        }
-      },
-      "required": [
-        "attack_vector",
-        "attack_complexity",
-        "privileges_required",
-        "user_interaction",
-        "scope",
-        "confidentiality_impact",
-        "integrity_impact",
-        "availability_impact"
-      ],
-      "type": "object"
-    },
-    "ErrorDetail": {
-      "properties": {
-        "code": {
-          "enum": [
-            "invalid_argument",
-            "not_found",
-            "rate_limit_exceeded",
-            "auth_required",
-            "tier_limit",
-            "upstream_timeout",
-            "upstream_error",
-            "internal_error"
-          ],
-          "type": "string"
-        },
-        "docs_url": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "message": {
-          "maxLength": 500,
-          "type": "string"
-        },
-        "retry_after_seconds": {
-          "anyOf": [
-            {
-              "type": "integer"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "upgrade_url": {
-          "anyOf": [
-            {
-              "type": "string"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        }
-      },
-      "required": [
-        "code",
-        "message"
-      ],
-      "type": "object"
-    },
-    "ErrorResponse": {
-      "properties": {
-        "error": {
-          "$ref": "#/$defs/ErrorDetail"
-        }
-      },
-      "required": [
-        "error"
-      ],
-      "type": "object"
-    },
-    "PivotHint": {
-      "additionalProperties": true,
-      "properties": {
-        "input": {
-          "type": "string"
-        },
-        "params": {
-          "anyOf": [
-            {
-              "additionalProperties": {
-                "type": "string"
-              },
-              "type": "object"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "reason": {
-          "type": "string"
-        },
-        "tool": {
-          "enum": [
-            "cve_lookup",
-            "cve_search",
-            "cve_leading",
-            "bulk_cve_lookup",
-            "calculate_risk_score",
-            "get_cvss_details",
-            "exploit_lookup",
-            "kev_detail",
-            "cwe_lookup",
-            "subdomain_enum",
-            "ssl_check",
-            "tech_fingerprint",
-            "asn_lookup",
-            "ip_lookup",
-            "ioc_lookup",
-            "bulk_ioc_lookup",
-            "hash_lookup",
-            "threat_intel",
-            "threat_report",
-            "audit_domain",
-            "domain_report",
-            "dns_lookup",
-            "whois_lookup",
-            "wayback_lookup",
-            "scan_headers",
-            "check_headers",
-            "check_secrets",
-            "check_injection",
-            "check_dependencies",
-            "email_mx",
-            "email_security_posture",
-            "email_disposable",
-            "email_verify",
-            "robots_txt",
-            "redirect_chain",
-            "brand_assets",
-            "seo_audit",
-            "phone_lookup",
-            "username_lookup",
-            "password_check",
-            "phishing_check",
-            "atlas_technique_lookup",
-            "atlas_technique_search",
-            "bulk_atlas_technique_lookup",
-            "atlas_case_study_lookup",
-            "atlas_case_study_search",
-            "d3fend_defense_lookup",
-            "d3fend_defense_search",
-            "d3fend_defense_for_attack",
-            "d3fend_attack_coverage",
-            "sigma_rule_lookup",
-            "bulk_sigma_rule_lookup",
-            "tech_stack_cve_audit"
-          ],
-          "type": "string"
-        }
-      },
-      "required": [
-        "tool",
-        "input",
-        "reason"
-      ],
-      "type": "object"
-    },
-    "Verdict": {
-      "properties": {
-        "completeness": {
-          "enum": [
-            "complete",
-            "partial",
-            "minimal"
-          ],
-          "type": "string"
-        },
-        "data_age_seconds": {
-          "anyOf": [
-            {
-              "type": "integer"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "deterministic": {
-          "type": "boolean"
-        },
-        "falsifiable_fields": {
-          "items": {
-            "type": "string"
-          },
-          "type": "array"
-        },
-        "sources_queried": {
-          "items": {
-            "type": "string"
-          },
-          "type": "array"
-        },
-        "sources_unavailable": {
-          "items": {
-            "type": "string"
-          },
-          "type": "array"
-        }
-      },
-      "required": [
-        "deterministic"
-      ],
-      "type": "object"
-    }
-  },
-  "properties": {
-    "result": {
-      "anyOf": [
-        {
-          "$ref": "#/$defs/CvssDetailsResponse"
-        },
-        {
-          "$ref": "#/$defs/ErrorResponse"
-        }
-      ]
-    }
-  },
-  "required": [
-    "result"
-  ],
-  "type": "object"
-}New value: +null

Changed86 schema fields changedMay 17, 2026
- removedOutput schema / $defs / CvssDetailsResponse / description
```
Removed value: -"Per-metric breakdown of a CVSS v3.x vector string."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / base_score / description
```
Removed value: -"Recomputed base score (0.0-10.0)."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / base_score / title
```
Removed value: -"Base Score"
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / base_severity / description
```
Removed value: -"Base severity label: NONE / LOW / MEDIUM / HIGH / CRITICAL."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / base_severity / title
```
Removed value: -"Base Severity"
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / environmental_score / default
```
Removed value: -null
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / environmental_score / description
```
Removed value: -"Environmental score when env metrics are explicit; null otherwise."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / environmental_score / title
```
Removed value: -"Environmental Score"
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / metrics / description
```
Removed value: -"Per-metric human-readable breakdown."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / next_calls / default
```
Removed value: -null
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / next_calls / description
```
Removed value: -"Suggested follow-up MCP tool calls. Ordered by relevance; agents should chain these without re-prompting the user."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / next_calls / title
```
Removed value: -"Next Calls"
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / summary / description
```
Removed value: -"One-line agent-friendly summary."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / summary / title
```
Removed value: -"Summary"
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / temporal_score / default
```
Removed value: -null
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / temporal_score / description
```
Removed value: -"Temporal score when temporal metrics are explicit; null otherwise."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / temporal_score / title
```
Removed value: -"Temporal Score"
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / vector / description
```
Removed value: -"Canonicalized CVSS vector string."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / vector / title
```
Removed value: -"Vector"
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / verdict / default
```
Removed value: -null
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / verdict / description
```
Removed value: -"Falsifiability metadata: sources_queried, sources_unavailable, completeness, deterministic flag. Lets agents distinguish 'no data' from 'source failed' without re-running the call."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / version / description
```
Removed value: -"CVSS specification version, e.g. '3.1' or '3.0'."
```
- removedOutput schema / $defs / CvssDetailsResponse / properties / version / title
```
Removed value: -"Version"
```
- removedOutput schema / $defs / CvssDetailsResponse / title
```
Removed value: -"CvssDetailsResponse"
```
- removedOutput schema / $defs / CvssMetrics / properties / attack_complexity / description
```
Removed value: -"AC — LOW / HIGH."
```
- removedOutput schema / $defs / CvssMetrics / properties / attack_complexity / title
```
Removed value: -"Attack Complexity"
```
- removedOutput schema / $defs / CvssMetrics / properties / attack_vector / description
```
Removed value: -"AV — NETWORK / ADJACENT_NETWORK / LOCAL / PHYSICAL."
```
- removedOutput schema / $defs / CvssMetrics / properties / attack_vector / title
```
Removed value: -"Attack Vector"
```
- removedOutput schema / $defs / CvssMetrics / properties / availability_impact / description
```
Removed value: -"A — NONE / LOW / HIGH."
```
- removedOutput schema / $defs / CvssMetrics / properties / availability_impact / title
```
Removed value: -"Availability Impact"
```
- removedOutput schema / $defs / CvssMetrics / properties / confidentiality_impact / description
```
Removed value: -"C — NONE / LOW / HIGH."
```
- removedOutput schema / $defs / CvssMetrics / properties / confidentiality_impact / title
```
Removed value: -"Confidentiality Impact"
```
- removedOutput schema / $defs / CvssMetrics / properties / integrity_impact / description
```
Removed value: -"I — NONE / LOW / HIGH."
```
- removedOutput schema / $defs / CvssMetrics / properties / integrity_impact / title
```
Removed value: -"Integrity Impact"
```
- removedOutput schema / $defs / CvssMetrics / properties / privileges_required / description
```
Removed value: -"PR — NONE / LOW / HIGH."
```
- removedOutput schema / $defs / CvssMetrics / properties / privileges_required / title
```
Removed value: -"Privileges Required"
```
- removedOutput schema / $defs / CvssMetrics / properties / scope / description
```
Removed value: -"S — UNCHANGED / CHANGED."
```
- removedOutput schema / $defs / CvssMetrics / properties / scope / title
```
Removed value: -"Scope"
```
- removedOutput schema / $defs / CvssMetrics / properties / user_interaction / description
```
Removed value: -"UI — NONE / REQUIRED."
```
- removedOutput schema / $defs / CvssMetrics / properties / user_interaction / title
```
Removed value: -"User Interaction"
```
- removedOutput schema / $defs / CvssMetrics / title
```
Removed value: -"CvssMetrics"
```
- removedOutput schema / $defs / ErrorDetail / description
```
Removed value: -"Structured failure body. Codes mirror app/exceptions.AppException\nsubclasses; agent retry / upgrade decisions key off `code`, not `message`."
```
- removedOutput schema / $defs / ErrorDetail / properties / code / description
```
Removed value: -"Stable machine-readable failure category. Agents key retry/upgrade decisions off this."
```
- removedOutput schema / $defs / ErrorDetail / properties / code / title
```
Removed value: -"Code"
```
- removedOutput schema / $defs / ErrorDetail / properties / docs_url / default
```
Removed value: -null
```
- removedOutput schema / $defs / ErrorDetail / properties / docs_url / description
```
Removed value: -"Documentation pointer (e.g. tool input contract) when code='invalid_argument'."
```
- removedOutput schema / $defs / ErrorDetail / properties / docs_url / title
```
Removed value: -"Docs Url"
```
- removedOutput schema / $defs / ErrorDetail / properties / message / description
```
Removed value: -"Human-readable detail. Free text — never parse. Capped at 500 chars to prevent oversized upstream errors from bloating responses."
```
- removedOutput schema / $defs / ErrorDetail / properties / message / title
```
Removed value: -"Message"
```
- removedOutput schema / $defs / ErrorDetail / properties / retry_after_seconds / default
```
Removed value: -null
```
- removedOutput schema / $defs / ErrorDetail / properties / retry_after_seconds / description
```
Removed value: -"When code='rate_limit_exceeded', the minimum seconds to wait before retrying."
```
- removedOutput schema / $defs / ErrorDetail / properties / retry_after_seconds / title
```
Removed value: -"Retry After Seconds"
```
- removedOutput schema / $defs / ErrorDetail / properties / upgrade_url / default
```
Removed value: -null
```
- removedOutput schema / $defs / ErrorDetail / properties / upgrade_url / description
```
Removed value: -"Pricing/upgrade URL when code='tier_limit' or 'rate_limit_exceeded' on the Free tier."
```
- removedOutput schema / $defs / ErrorDetail / properties / upgrade_url / title
```
Removed value: -"Upgrade Url"
```
- removedOutput schema / $defs / ErrorDetail / title
```
Removed value: -"ErrorDetail"
```
- removedOutput schema / $defs / ErrorResponse / description
```
Removed value: -"MCP error envelope. Tool return type is always\n`SpecificResponse | ErrorResponse` — Union flag tells the agent which arm\narrived without parsing the inner body."
```
- removedOutput schema / $defs / ErrorResponse / title
```
Removed value: -"ErrorResponse"
```
- removedOutput schema / $defs / PivotHint / description
```
Removed value: -"A suggested follow-up MCP tool call. Surfaced inside response.next_calls so\nLLM agents can chain related lookups without manual prompting. Each hint names\nthe tool, the input value to pass, and a short reason explaining why this\npivot adds value in the current context."
```
- removedOutput schema / $defs / PivotHint / properties / input / description
```
Removed value: -"Suggested input value to pass to the tool — typically a CVE ID, CWE ID, domain, or IP. Pre-populated from the current response so the agent can call the next tool without re-deriving the argument."
```
- removedOutput schema / $defs / PivotHint / properties / input / title
```
Removed value: -"Input"
```
- removedOutput schema / $defs / PivotHint / properties / params / default
```
Removed value: -null
```
- removedOutput schema / $defs / PivotHint / properties / params / description
```
Removed value: -"Optional extra kwargs to pass alongside `input`. Used by pivot generators when the next call benefits from a secondary parameter, e.g. {'exclude_id': 'AML.T0051'} to skip the originating technique from a sibling-tactic search. Omitted when no extra args are needed."
```
- removedOutput schema / $defs / PivotHint / properties / params / title
```
Removed value: -"Params"
```
- removedOutput schema / $defs / PivotHint / properties / reason / description
```
Removed value: -"Short rationale (one sentence) for why this follow-up call adds value, e.g. 'Federal patch deadline + ransomware association', 'Public exploits / PoC availability'."
```
- removedOutput schema / $defs / PivotHint / properties / reason / title
```
Removed value: -"Reason"
```
- removedOutput schema / $defs / PivotHint / properties / tool / description
```
Removed value: -"Canonical MCP tool name to call next. Constrained to known operation_ids in tools/list — adding a new tool here requires expanding the Literal."
```
- removedOutput schema / $defs / PivotHint / properties / tool / title
```
Removed value: -"Tool"
```
- removedOutput schema / $defs / PivotHint / title
```
Removed value: -"PivotHint"
```
- removedOutput schema / $defs / Verdict / properties / completeness / default
```
Removed value: -"complete"
```
- removedOutput schema / $defs / Verdict / properties / completeness / description
```
Removed value: -"'complete' = every planned source returned data; 'partial' = at least one source in sources_unavailable failed or was skipped; 'minimal' = only the primary/required source returned, optional enrichment missing."
```
- removedOutput schema / $defs / Verdict / properties / completeness / title
```
Removed value: -"Completeness"
```
- removedOutput schema / $defs / Verdict / properties / data_age_seconds / default
```
Removed value: -null
```
- removedOutput schema / $defs / Verdict / properties / data_age_seconds / description
```
Removed value: -"Seconds elapsed since the oldest cached source was fetched, or null when every source was queried live for this request. Use to judge freshness."
```
- removedOutput schema / $defs / Verdict / properties / data_age_seconds / title
```
Removed value: -"Data Age Seconds"
```
- removedOutput schema / $defs / Verdict / properties / deterministic / description
```
Removed value: -"True when the response is fully reproducible from the listed sources for the same input at the same moment (no randomness, no model inference). False for endpoints that include probabilistic scoring or LLM output."
```
- removedOutput schema / $defs / Verdict / properties / deterministic / title
```
Removed value: -"Deterministic"
```
- removedOutput schema / $defs / Verdict / properties / falsifiable_fields / description
```
Removed value: -"Top-level response fields whose values a caller can independently re-derive from the named upstream sources (e.g. 'dns', 'ssl', 'whois'). Fields not in this list are derived/computed and cannot be directly re-verified."
```
- removedOutput schema / $defs / Verdict / properties / falsifiable_fields / title
```
Removed value: -"Falsifiable Fields"
```
- removedOutput schema / $defs / Verdict / properties / sources_queried / description
```
Removed value: -"Canonical source identifiers successfully consulted for this response (e.g. 'ripe_stat', 'shodan_internetdb', 'firehol'). Agent-readable list, order not significant."
```
- removedOutput schema / $defs / Verdict / properties / sources_queried / title
```
Removed value: -"Sources Queried"
```
- removedOutput schema / $defs / Verdict / properties / sources_unavailable / description
```
Removed value: -"Sources that were expected but not returned — either intentionally skipped (lite mode, tier gating) or failed (quota, timeout, upstream down). Empty list means every planned source produced data."
```
- removedOutput schema / $defs / Verdict / properties / sources_unavailable / title
```
Removed value: -"Sources Unavailable"
```
- removedOutput schema / $defs / Verdict / title
```
Removed value: -"Verdict"
```
- removedOutput schema / properties / result / title
```
Removed value: -"Result"
```
- removedOutput schema / title
```
Removed value: -"get_cvss_detailsOutput"
```

Changed1 schema field changedMay 15, 2026

changedOutput schema / $defs / PivotHint / properties / tool / enum

Previous value: -[
-  "cve_lookup",
-  "cve_search",
-  "cve_leading",
-  "bulk_cve_lookup",
-  "calculate_risk_score",
-  "get_cvss_details",
-  "exploit_lookup",
-  "kev_detail",
-  "cwe_lookup",
-  "subdomain_enum",
-  "ssl_check",
-  "tech_fingerprint",
-  "asn_lookup",
-  "ip_lookup",
-  "ioc_lookup",
-  "bulk_ioc_lookup",
-  "hash_lookup",
-  "threat_intel",
-  "threat_report",
-  "audit_domain",
-  "domain_report",
-  "dns_lookup",
-  "whois_lookup",
-  "wayback_lookup",
-  "scan_headers",
-  "check_headers",
-  "check_secrets",
-  "check_injection",
-  "check_dependencies",
-  "email_mx",
-  "email_security_posture",
-  "email_disposable",
-  "email_verify",
-  "robots_txt",
-  "redirect_chain",
-  "brand_assets",
-  "seo_audit",
-  "phone_lookup",
-  "username_lookup",
-  "password_check",
-  "phishing_check",
-  "atlas_technique_lookup",
-  "atlas_technique_search",
-  "bulk_atlas_technique_lookup",
-  "atlas_case_study_lookup",
-  "atlas_case_study_search",
-  "d3fend_defense_lookup",
-  "d3fend_defense_search",
-  "d3fend_defense_for_attack",
-  "d3fend_attack_coverage",
-  "sigma_rule_lookup",
-  "bulk_sigma_rule_lookup"
-]New value: +[
+  "cve_lookup",
+  "cve_search",
+  "cve_leading",
+  "bulk_cve_lookup",
+  "calculate_risk_score",
+  "get_cvss_details",
+  "exploit_lookup",
+  "kev_detail",
+  "cwe_lookup",
+  "subdomain_enum",
+  "ssl_check",
+  "tech_fingerprint",
+  "asn_lookup",
+  "ip_lookup",
+  "ioc_lookup",
+  "bulk_ioc_lookup",
+  "hash_lookup",
+  "threat_intel",
+  "threat_report",
+  "audit_domain",
+  "domain_report",
+  "dns_lookup",
+  "whois_lookup",
+  "wayback_lookup",
+  "scan_headers",
+  "check_headers",
+  "check_secrets",
+  "check_injection",
+  "check_dependencies",
+  "email_mx",
+  "email_security_posture",
+  "email_disposable",
+  "email_verify",
+  "robots_txt",
+  "redirect_chain",
+  "brand_assets",
+  "seo_audit",
+  "phone_lookup",
+  "username_lookup",
+  "password_check",
+  "phishing_check",
+  "atlas_technique_lookup",
+  "atlas_technique_search",
+  "bulk_atlas_technique_lookup",
+  "atlas_case_study_lookup",
+  "atlas_case_study_search",
+  "d3fend_defense_lookup",
+  "d3fend_defense_search",
+  "d3fend_defense_for_attack",
+  "d3fend_attack_coverage",
+  "sigma_rule_lookup",
+  "bulk_sigma_rule_lookup",
+  "tech_stack_cve_audit"
+]

Changed1 schema field changedMay 12, 2026

changedOutput schema / $defs / PivotHint / properties / tool / enum

Previous value: -[
-  "cve_lookup",
-  "cve_search",
-  "cve_leading",
-  "bulk_cve_lookup",
-  "calculate_risk_score",
-  "get_cvss_details",
-  "exploit_lookup",
-  "kev_detail",
-  "cwe_lookup",
-  "subdomain_enum",
-  "ssl_check",
-  "tech_fingerprint",
-  "asn_lookup",
-  "ip_lookup",
-  "ioc_lookup",
-  "bulk_ioc_lookup",
-  "hash_lookup",
-  "threat_intel",
-  "threat_report",
-  "audit_domain",
-  "domain_report",
-  "dns_lookup",
-  "whois_lookup",
-  "wayback_lookup",
-  "scan_headers",
-  "check_headers",
-  "check_secrets",
-  "check_injection",
-  "check_dependencies",
-  "email_mx",
-  "email_security_posture",
-  "email_disposable",
-  "email_verify",
-  "robots_txt",
-  "redirect_chain",
-  "brand_assets",
-  "seo_audit",
-  "phone_lookup",
-  "username_lookup",
-  "password_check",
-  "phishing_check",
-  "atlas_technique_lookup",
-  "atlas_technique_search",
-  "bulk_atlas_technique_lookup",
-  "atlas_case_study_lookup",
-  "atlas_case_study_search",
-  "d3fend_defense_lookup",
-  "d3fend_defense_search",
-  "d3fend_defense_for_attack",
-  "d3fend_attack_coverage"
-]New value: +[
+  "cve_lookup",
+  "cve_search",
+  "cve_leading",
+  "bulk_cve_lookup",
+  "calculate_risk_score",
+  "get_cvss_details",
+  "exploit_lookup",
+  "kev_detail",
+  "cwe_lookup",
+  "subdomain_enum",
+  "ssl_check",
+  "tech_fingerprint",
+  "asn_lookup",
+  "ip_lookup",
+  "ioc_lookup",
+  "bulk_ioc_lookup",
+  "hash_lookup",
+  "threat_intel",
+  "threat_report",
+  "audit_domain",
+  "domain_report",
+  "dns_lookup",
+  "whois_lookup",
+  "wayback_lookup",
+  "scan_headers",
+  "check_headers",
+  "check_secrets",
+  "check_injection",
+  "check_dependencies",
+  "email_mx",
+  "email_security_posture",
+  "email_disposable",
+  "email_verify",
+  "robots_txt",
+  "redirect_chain",
+  "brand_assets",
+  "seo_audit",
+  "phone_lookup",
+  "username_lookup",
+  "password_check",
+  "phishing_check",
+  "atlas_technique_lookup",
+  "atlas_technique_search",
+  "bulk_atlas_technique_lookup",
+  "atlas_case_study_lookup",
+  "atlas_case_study_search",
+  "d3fend_defense_lookup",
+  "d3fend_defense_search",
+  "d3fend_defense_for_attack",
+  "d3fend_attack_coverage",
+  "sigma_rule_lookup",
+  "bulk_sigma_rule_lookup"
+]

Changed1 schema field changedMay 12, 2026

changedOutput schema / $defs / PivotHint / properties / tool / enum

Previous value: -[
-  "cve_lookup",
-  "cve_search",
-  "cve_leading",
-  "bulk_cve_lookup",
-  "calculate_risk_score",
-  "get_cvss_details",
-  "exploit_lookup",
-  "kev_detail",
-  "cwe_lookup",
-  "subdomain_enum",
-  "ssl_check",
-  "tech_fingerprint",
-  "asn_lookup",
-  "ip_lookup",
-  "ioc_lookup",
-  "bulk_ioc_lookup",
-  "hash_lookup",
-  "threat_intel",
-  "threat_report",
-  "audit_domain",
-  "domain_report",
-  "dns_lookup",
-  "whois_lookup",
-  "wayback_lookup",
-  "scan_headers",
-  "check_headers",
-  "check_secrets",
-  "check_injection",
-  "check_dependencies",
-  "email_mx",
-  "email_disposable",
-  "email_verify",
-  "robots_txt",
-  "redirect_chain",
-  "brand_assets",
-  "seo_audit",
-  "phone_lookup",
-  "username_lookup",
-  "password_check",
-  "phishing_check",
-  "atlas_technique_lookup",
-  "atlas_technique_search",
-  "bulk_atlas_technique_lookup",
-  "atlas_case_study_lookup",
-  "atlas_case_study_search",
-  "d3fend_defense_lookup",
-  "d3fend_defense_search",
-  "d3fend_defense_for_attack",
-  "d3fend_attack_coverage"
-]New value: +[
+  "cve_lookup",
+  "cve_search",
+  "cve_leading",
+  "bulk_cve_lookup",
+  "calculate_risk_score",
+  "get_cvss_details",
+  "exploit_lookup",
+  "kev_detail",
+  "cwe_lookup",
+  "subdomain_enum",
+  "ssl_check",
+  "tech_fingerprint",
+  "asn_lookup",
+  "ip_lookup",
+  "ioc_lookup",
+  "bulk_ioc_lookup",
+  "hash_lookup",
+  "threat_intel",
+  "threat_report",
+  "audit_domain",
+  "domain_report",
+  "dns_lookup",
+  "whois_lookup",
+  "wayback_lookup",
+  "scan_headers",
+  "check_headers",
+  "check_secrets",
+  "check_injection",
+  "check_dependencies",
+  "email_mx",
+  "email_security_posture",
+  "email_disposable",
+  "email_verify",
+  "robots_txt",
+  "redirect_chain",
+  "brand_assets",
+  "seo_audit",
+  "phone_lookup",
+  "username_lookup",
+  "password_check",
+  "phishing_check",
+  "atlas_technique_lookup",
+  "atlas_technique_search",
+  "bulk_atlas_technique_lookup",
+  "atlas_case_study_lookup",
+  "atlas_case_study_search",
+  "d3fend_defense_lookup",
+  "d3fend_defense_search",
+  "d3fend_defense_for_attack",
+  "d3fend_attack_coverage"
+]

AddedMay 8, 2026

TDQS

A4.4/5.0

Behavior4/5

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

Annotations already declare this as readOnly and idempotent, and the description adds valuable context: v2 vectors are rejected with a 400 status, rate limits (Free: 30/hr, Pro: 500/hr) are stated, and the detailed return structure is outlined. It does not disclose error handling beyond v2 rejection, but the provided extras go beyond the 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?

The description is lengthy but well-structured and front-loaded with the core purpose. It packs substantial detail (output fields, usage, limitations, rate limits) without fluff. The density is high but each sentence earns its place, so it is concise in content despite its length.

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?

The description covers input requirements, output structure, error behavior for unsupported vectors, rate limits, and guidance for both parsing and verification use cases. Given the complexity of CVSS parsing and the rich output schema mentioned, this description is complete enough for an agent to select and invoke the tool effectively without additional external knowledge.

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?

The schema description for 'vector' already covers the parameter fully (coverage 100%), including the rejection of v2 vectors. The tool description repeats this information and adds an example, but does not fundamentally enrich the parameter semantics beyond what the schema provides. Baseline 3 is appropriate.

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 opens with a specific verb and resource: 'Parse a CVSS v3.x vector string into a per-metric breakdown plus a recomputed base score.' This clearly distinguishes the tool from siblings like cve_lookup or calculate_risk_score, which handle different aspects of vulnerability data.

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

Usage Guidelines5/5

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

Explicit guidance is provided: 'Use to translate raw CVSS strings into agent-friendly attributes without re-parsing the vector grammar yourself, and to verify upstream NVD scoring against the recomputed value.' It also names an alternative for v2 vectors: 'read cvss_v2_vector from cve_lookup if you need v2 detail.'

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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