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mev_intel

Read-only

MEV event rates per chain and type vs the trailing weekly pace. window in hours, default 24, max 168. Types overlap and must not be summed: a backrun transaction also emits an arbitrage row. NFT coverage is ERC-721 only, so nft_mev excludes all ERC-1155 activity. Chains covered: ethereum, bnb, avalanche, polygon. Price: 2 cents per call.

Input Schema

NameRequiredDescriptionDefault
chainNoOne of ethereum, bnb, avalanche, polygon; absent = all four. Example: ethereum
windowNoWindow in whole hours, 1 to 168, default 24. Example: 6

Output Schema

NameRequiredDescriptionDefault
resultsYes
dataGapsNoPresent only when the window of the answer overlaps a recorded data gap. Figures inside each listed period are incomplete. periods are the recorded gaps (end null while still open); atCall is measured against the window of this call and is left out of meta.contentHash.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • addedInput schema / properties / chain / description
      Added value: +"One of ethereum, bnb, avalanche, polygon; absent = all four. Example: ethereum"
    • addedInput schema / properties / window / description
      Added value: +"Window in whole hours, 1 to 168, default 24. Example: 6"
  2. Changed1 schema field changed
    • changedInput schema / x-lexicon / bundleSha256
      Previous value: -"670f7504e3de5031beccee25a2d24e4515f68b893295f6d5b0d3a0665498b2c9"New value: +"25cc80db6d8e9eac73d47a50f7ad6333a21f1972d008a8fed0159de8bfb4b519"
  3. Changed2 schema fields changed
    • changedInput schema / x-lexicon / bundleSha256
      Previous value: -"e5b4290024a229f2bdf97f8fc6a0079c3fe13b77267f41fdcffeb8b26aa1c41e"New value: +"670f7504e3de5031beccee25a2d24e4515f68b893295f6d5b0d3a0665498b2c9"
    • changedInput schema / x-lexicon / version
      Previous value: -"0.1.0"New value: +"0.2.0"
  4. Changed5 schema fields changed
    • addedInput schema / additionalProperties
      Added value: +false
    • addedOutput schema / properties / dataGaps
      Added value: +{
+  "additionalProperties": false,
+  "description": "Present only when the window of the answer overlaps a recorded data gap. Figures inside each listed period are incomplete. periods are the recorded gaps (end null while still open); atCall is measured against the window of this call and is left out of meta.contentHash.",
+  "properties": {
+    "gaps": {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "atCall": {
+            "additionalProperties": false,
+            "properties": {
+              "note": {
+                "type": "string"
+              },
+              "periodsInWindow": {
+                "items": {
+                  "additionalProperties": false,
+                  "properties": {
+                    "end": {
+                      "type": "number"
+                    },
+                    "ongoing": {
+                      "type": "boolean"
+                    },
+                    "start": {
+                      "type": "number"
+                    }
+                  },
+                  "required": [
+                    "start",
+                    "end"
+                  ],
+                  "type": "object"
+                },
+                "type": "array"
+              },
+              "shareOfWindowPct": {
+                "type": "number"
+              },
+              "windowEnd": {
+                "type": "number"
+              },
+              "windowStart": {
+                "type": "number"
+              }
+            },
+            "required": [
+              "windowStart",
+              "windowEnd",
+              "periodsInWindow",
+              "shareOfWindowPct",
+              "note"
+            ],
+            "type": "object"
+          },
+          "chain": {
+            "type": "string"
+          },
+          "data": {
+            "type": "string"
+          },
+          "periods": {
+            "items": {
+              "additionalProperties": false,
+              "properties": {
+                "end": {
+                  "type": [
+                    "number",
+                    "null"
+                  ]
+                },
+                "ongoing": {
+                  "type": "boolean"
+                },
+                "start": {
+                  "type": "number"
+                }
+              },
+              "required": [
+                "start",
+                "end"
+              ],
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "records": {
+            "items": {
+              "additionalProperties": false,
+              "properties": {
+                "lost": {
+                  "type": [
+                    "number",
+                    "null"
+                  ]
+                },
+                "lostUnit": {
+                  "type": [
+                    "string",
+                    "null"
+                  ]
+                },
+                "record": {
+                  "type": "string"
+                },
+                "source": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "source",
+                "record"
+              ],
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "section": {
+            "type": "string"
+          },
+          "window": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "section",
+          "chain",
+          "data",
+          "window",
+          "periods",
+          "records",
+          "atCall"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "statement": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "statement",
+    "gaps"
+  ],
+  "type": "object"
+}
    • removedOutput schema / properties / meta
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "contentHash": {
-      "type": "string"
-    },
-    "generated": {
-      "type": "number"
-    },
-    "priceUsd": {
-      "type": "number"
-    },
-    "validUntil": {
-      "type": "number"
-    }
-  },
-  "type": "object"
-}
    • removedOutput schema / properties / receipt
      Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "bytes": {
-      "type": "number"
-    },
-    "covers": {
-      "type": "string"
-    },
-    "issuedAt": {
-      "type": "number"
-    },
-    "lookup": {
-      "type": "string"
-    },
-    "network": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "nonce": {
-      "type": "string"
-    },
-    "seq": {
-      "type": "number"
-    },
-    "settleTx": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "sha256": {
-      "type": "string"
-    },
-    "tool": {
-      "type": [
-        "string",
-        "null"
-      ]
-    }
-  },
-  "type": "object"
-}
    • addedOutput schema / properties / results / items / properties / byRule
      Added value: +{
+  "items": {
+    "additionalProperties": false,
+    "properties": {
+      "countIn7Days": {
+        "type": "number"
+      },
+      "countInWindow": {
+        "type": "number"
+      },
+      "from": {
+        "type": "number"
+      },
+      "rule": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "to": {
+        "type": "number"
+      }
+    },
+    "type": "object"
+  },
+  "type": "array"
+}
  5. Changed2 schema fields changed
    • addedOutput schema / properties / results / items / properties / windowEnd
      Added value: +{
+  "type": [
+    "number",
+    "null"
+  ]
+}
    • addedOutput schema / properties / results / items / properties / windowStart
      Added value: +{
+  "type": [
+    "number",
+    "null"
+  ]
+}
  6. Changed4 schema fields changed
    • changedOutput schema / properties / results / items / properties / count / type
      Previous value: -"number"New value: +[
+  "number",
+  "null"
+]
    • changedOutput schema / properties / results / items / properties / type / type
      Previous value: -"string"New value: +[
+  "string",
+  "null"
+]
    • addedOutput schema / properties / results / items / properties / unavailable
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • changedOutput schema / properties / results / items / properties / weeklyPaceSameWindow / type
      Previous value: -"number"New value: +[
+  "number",
+  "null"
+]
  7. Changed1 schema field changed
    • changedInput schema / x-lexicon / bundleSha256
      Previous value: -"a1c2e10fd3177d6b4d59ca78693e8fb36880165cf0f735f680dd86a510411178"New value: +"e5b4290024a229f2bdf97f8fc6a0079c3fe13b77267f41fdcffeb8b26aa1c41e"
  8. Changed1 schema field changed
    • changedInput schema / x-lexicon / bundleSha256
      Previous value: -"1eeb782ee15fe69fc80776948e0556fa6b795e210e6305935b2c97b73d955cda"New value: +"a1c2e10fd3177d6b4d59ca78693e8fb36880165cf0f735f680dd86a510411178"
  9. Changed1 schema field changed
    • changedInput schema / x-lexicon / bundleSha256
      Previous value: -"c014292cad7497ce9fd68c33345ac32cb42b672c8e77d6c749c26e162cc207e4"New value: +"1eeb782ee15fe69fc80776948e0556fa6b795e210e6305935b2c97b73d955cda"
  10. Changed2 schema fields changed
    • addedInput schema / x-lexicon
      Added value: +{
+  "bundleSha256": "c014292cad7497ce9fd68c33345ac32cb42b672c8e77d6c749c26e162cc207e4",
+  "name": "ChainHelix Agentic Lexicon",
+  "resolve": "lexicon_resolve",
+  "spec": "lexicon_spec",
+  "version": "0.1.0"
+}
    • addedInput schema / x-vocab
      Added value: +{
+  "chain": "onchain.chain",
+  "window": "market.window"
+}
  11. Changed1 schema field changed
    • changedInput schema / properties / chain / enum
      Previous value: -[
-  "bitcoin",
-  "ethereum",
-  "bnb",
-  "solana",
-  "avalanche",
-  "xrp",
-  "tron",
-  "polygon",
-  "sui"
-]New value: +[
+  "ethereum",
+  "bnb",
+  "avalanche",
+  "polygon"
+]
  12. Changed6 schema fields changed
    • addedOutput schema / properties / meta
      Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "contentHash": {
+      "type": "string"
+    },
+    "generated": {
+      "type": "number"
+    },
+    "priceUsd": {
+      "type": "number"
+    },
+    "validUntil": {
+      "type": "number"
+    }
+  },
+  "type": "object"
+}
    • addedOutput schema / properties / receipt
      Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "bytes": {
+      "type": "number"
+    },
+    "covers": {
+      "type": "string"
+    },
+    "issuedAt": {
+      "type": "number"
+    },
+    "lookup": {
+      "type": "string"
+    },
+    "network": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "nonce": {
+      "type": "string"
+    },
+    "seq": {
+      "type": "number"
+    },
+    "settleTx": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "sha256": {
+      "type": "string"
+    },
+    "tool": {
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}
    • addedOutput schema / properties / results / items / properties / calibration
      Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedOutput schema / properties / results / items / properties / latestBucket
      Added value: +{
+  "type": [
+    "number",
+    "null"
+  ]
+}
    • addedOutput schema / properties / results / items / properties / rule
      Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "changedInsideWindow": {
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
+    "rule": {
+      "type": "string"
+    },
+    "since": {
+      "type": "string"
+    }
+  },
+  "type": [
+    "object",
+    "null"
+  ]
+}
    • addedOutput schema / properties / results / items / properties / source
      Added value: +{
+  "type": "string"
+}
  13. First observed

TDQS

A3.7/5.0
Behavior4/5

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

Annotations only declare readOnlyHint, so the description carries most of the load and does well: it discloses per-call cost (2 cents), warns that type rows overlap and must not be summed, and flags that NFT coverage is ERC-721 only, excluding ERC-1155. These are substantive behavioral caveats that would cause real errors if omitted. It does not state rate limits beyond price or freshness/latency of the data.

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?

Dense and front-loaded: the metric is stated first, then window semantics, then the two correctness caveats, then coverage and price. Every sentence earns its place, though the flat prose block buries the cost note at the end.

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?

With an output schema present, the description needn't explain return values, and it covers parameters, chain coverage, aggregation caveats, and pricing. The one meaningful gap is sibling differentiation, which matters given several overlapping MEV tools.

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%, with enum values and example for chain and range/default/example for window, so the schema already does the work and baseline 3 applies. The description restates the window bounds and default without adding format or interpretation details beyond the schema.

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 resource and metric: MEV event rates per chain and type compared against a trailing weekly pace. An agent knows exactly what the tool returns. It does not, however, name or distinguish itself from adjacent siblings like mev_pressure, mev_bots, or victim_flow, so the boundary is left implicit.

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?

Usage context is implied by the window semantics (default 24h, max 168h) and the chains covered, but there is no explicit when-to-use or when-not-to-use guidance and no routing to alternatives such as mev_pressure. The agent must infer the use case from the description alone.

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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