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loophole-tape

by io.github.gosadu
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New pump.fun launches with rug odds ($0.001)

launches_since
Read-onlyIdempotent

$0.001 per poll. New Solana tokens: every covered pump.fun memecoin launch after since, each with verdict and P(rug within 300 s). Use when polling: pass next_cursor back as since; an empty page costs the same. Stale feed: refused before payment. Fields: loopholetape://schema/launches_since.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNolaunches per call
sinceNounix seconds of the last launch seen (next_cursor of the previous call); omit for the last 60 s
no_avoidNotrue or 1: leave out items whose verdict is avoid
min_p_gradNokeep items whose P(true graduation) is at least this (0 = no floor)

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
okNo
dataNo
metaNo
coverageNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "properties": {
+    "coverage": {
+      "type": "string"
+    },
+    "data": {
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "meta": {
+      "type": "object"
+    },
+    "ok": {
+      "type": "boolean"
+    }
+  },
+  "type": "object"
+}
  2. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -{
-  "anyOf": [
-    {
-      "properties": {
-        "coverage": {
-          "enum": [
-            "full",
-            "thin"
-          ]
-        },
-        "data": {
-          "properties": {
-            "count": {
-              "type": "integer"
-            },
-            "feed": {
-              "type": "object"
-            },
-            "filters": {
-              "type": "object"
-            },
-            "items": {
-              "items": {
-                "type": "object"
-              },
-              "type": "array"
-            },
-            "next_cursor": {
-              "type": "number"
-            },
-            "since": {
-              "type": "number"
-            },
-            "truncated": {
-              "type": "boolean"
-            }
-          },
-          "required": [
-            "since",
-            "next_cursor",
-            "count",
-            "truncated",
-            "items"
-          ],
-          "type": "object"
-        },
-        "meta": {
-          "type": "object"
-        },
-        "ok": {
-          "const": true
-        }
-      },
-      "required": [
-        "ok",
-        "schema_version",
-        "generated_at",
-        "t",
-        "coverage",
-        "data",
-        "meta"
-      ],
-      "type": "object"
-    },
-    {
-      "properties": {
-        "accepts": {
-          "minItems": 1,
-          "type": "array"
-        },
-        "x402Version": {
-          "const": 2
-        }
-      },
-      "required": [
-        "x402Version",
-        "accepts"
-      ],
-      "type": "object"
-    },
-    {
-      "properties": {
-        "error": {
-          "type": "string"
-        },
-        "ok": {
-          "const": false
-        }
-      },
-      "required": [
-        "ok",
-        "error"
-      ],
-      "type": "object"
-    }
-  ],
-  "type": "object"
-}New value: +null
  3. Changed9 schema fields changed
    • removedInput schema / properties / limit / title
      Removed value: -"Limit"
    • removedInput schema / properties / min_p_grad / title
      Removed value: -"Min P Grad"
    • removedInput schema / properties / no_avoid / title
      Removed value: -"No Avoid"
    • removedInput schema / properties / since / anyOf
      Removed value: -[
-  {
-    "type": "number"
-  },
-  {
-    "type": "null"
-  }
-]
    • removedInput schema / properties / since / title
      Removed value: -"Since"
    • addedInput schema / properties / since / type
      Added value: +[
+  "number",
+  "null"
+]
    • removedInput schema / title
      Removed value: -"launches_sinceArguments"
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "properties": {
-      "coverage": {
-        "enum": [
-          "full",
-          "thin"
-        ]
-      },
-      "data": {
-        "properties": {
-          "count": {
-            "type": "integer"
-          },
-          "feed": {
-            "type": "object"
-          },
-          "filters": {
-            "type": "object"
-          },
-          "items": {
-            "items": {
-              "type": "object"
-            },
-            "type": "array"
-          },
-          "next_cursor": {
-            "type": "number"
-          },
-          "since": {
-            "type": "number"
-          },
-          "truncated": {
-            "type": "boolean"
-          }
-        },
-        "required": [
-          "since",
-          "next_cursor",
-          "count",
-          "truncated",
-          "items"
-        ],
-        "type": "object"
-      },
-      "generated_at": {
-        "type": "string"
-      },
-      "meta": {
-        "properties": {
-          "feed_lag_s": {
-            "type": [
-              "number",
-              "null"
-            ]
-          },
-          "is_stale": {
-            "type": "boolean"
-          }
-        },
-        "type": "object"
-      },
-      "ok": {
-        "const": true
-      },
-      "schema_version": {
-        "type": "string"
-      },
-      "t": {
-        "type": "number"
-      }
-    },
-    "required": [
-      "ok",
-      "schema_version",
-      "generated_at",
-      "t",
-      "coverage",
-      "data",
-      "meta"
-    ],
-    "title": "LaunchesSince",
-    "type": "object"
-  },
-  {
-    "description": "isError: the x402 v2 payment requirements. Pay one accepts entry and call again with _meta['x402/payment']. error says why when a payment was sent and rejected; a failed settlement adds x402/payment-response. Nothing is charged.",
-    "properties": {
-      "accepts": {
-        "items": {
-          "properties": {
-            "amount": {
-              "type": "string"
-            },
-            "asset": {
-              "type": "string"
-            },
-            "extra": {
-              "type": "object"
-            },
-            "maxTimeoutSeconds": {
-              "type": "integer"
-            },
-            "network": {
-              "type": "string"
-            },
-            "payTo": {
-              "type": "string"
-            },
-            "scheme": {
-              "type": "string"
-            }
-          },
-          "required": [
-            "scheme",
-            "network",
-            "amount",
-            "asset",
-            "payTo"
-          ],
-          "type": "object"
-        },
-        "minItems": 1,
-        "type": "array"
-      },
-      "error": {
-        "type": "string"
-      },
-      "extensions": {
-        "type": "object"
-      },
-      "resource": {
-        "properties": {
-          "description": {
-            "type": "string"
-          },
-          "mimeType": {
-            "type": "string"
-          },
-          "url": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "url"
-        ],
-        "type": "object"
-      },
-      "x402/payment-response": {
-        "properties": {
-          "errorReason": {
-            "type": "string"
-          },
-          "network": {
-            "type": "string"
-          },
-          "success": {
-            "type": "boolean"
-          },
-          "transaction": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "success"
-        ],
-        "type": "object"
-      },
-      "x402Version": {
-        "const": 2
-      }
-    },
-    "required": [
-      "x402Version",
-      "resource",
-      "accepts"
-    ],
-    "title": "PaymentRequired",
-    "type": "object"
-  },
-  {
-    "description": "isError: a refusal answered without charging (invalid or uncovered arguments, stale feed, nothing new since the cursor, a payment that cannot be matched to this request). error is a stable code; live_examples name mints covered now.",
-    "properties": {
-      "address": {
-        "type": "string"
-      },
-      "avoid_skipped": {
-        "type": "integer"
-      },
-      "case_mangled_mints": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "charged": {
-        "type": [
-          "boolean",
-          "null"
-        ]
-      },
-      "curve": {
-        "type": "string"
-      },
-      "error": {
-        "type": "string"
-      },
-      "feed_lag_s": {
-        "type": [
-          "number",
-          "null"
-        ]
-      },
-      "free_check": {
-        "type": "string"
-      },
-      "got": {
-        "type": [
-          "string",
-          "integer"
-        ]
-      },
-      "hint": {
-        "type": "string"
-      },
-      "invalid": {
-        "type": "object"
-      },
-      "live_examples": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "max_feed_lag_s": {
-        "type": "number"
-      },
-      "max_mints": {
-        "type": "integer"
-      },
-      "max_table_lag_s": {
-        "type": "number"
-      },
-      "message": {
-        "type": "string"
-      },
-      "mint": {
-        "type": "string"
-      },
-      "missing": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "newest_cursor": {
-        "type": "string"
-      },
-      "ok": {
-        "const": false
-      },
-      "payment_status": {
-        "type": "string"
-      },
-      "scanned": {
-        "type": "integer"
-      },
-      "schema": {
-        "type": "object"
-      },
-      "since": {
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "table_lag_s": {
-        "type": [
-          "number",
-          "null"
-        ]
-      },
-      "tool": {
-        "type": "string"
-      },
-      "unavailable_mints": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "unverified_event": {
-        "type": [
-          "object",
-          "null"
-        ]
-      },
-      "window_s": {
-        "type": "number"
-      }
-    },
-    "required": [
-      "ok",
-      "error"
-    ],
-    "title": "Refusal",
-    "type": "object"
-  }
-]New value: +[
+  {
+    "properties": {
+      "coverage": {
+        "enum": [
+          "full",
+          "thin"
+        ]
+      },
+      "data": {
+        "properties": {
+          "count": {
+            "type": "integer"
+          },
+          "feed": {
+            "type": "object"
+          },
+          "filters": {
+            "type": "object"
+          },
+          "items": {
+            "items": {
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "next_cursor": {
+            "type": "number"
+          },
+          "since": {
+            "type": "number"
+          },
+          "truncated": {
+            "type": "boolean"
+          }
+        },
+        "required": [
+          "since",
+          "next_cursor",
+          "count",
+          "truncated",
+          "items"
+        ],
+        "type": "object"
+      },
+      "meta": {
+        "type": "object"
+      },
+      "ok": {
+        "const": true
+      }
+    },
+    "required": [
+      "ok",
+      "schema_version",
+      "generated_at",
+      "t",
+      "coverage",
+      "data",
+      "meta"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "accepts": {
+        "minItems": 1,
+        "type": "array"
+      },
+      "x402Version": {
+        "const": 2
+      }
+    },
+    "required": [
+      "x402Version",
+      "accepts"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "error": {
+        "type": "string"
+      },
+      "ok": {
+        "const": false
+      }
+    },
+    "required": [
+      "ok",
+      "error"
+    ],
+    "type": "object"
+  }
+]
    • removedOutput schema / description
      Removed value: -"One of three shapes. Success (isError false): the JSON envelope {ok, schema_version, generated_at, t, coverage, data, meta}. isError true: the x402 PaymentRequired {x402Version 2, resource, accepts[, error]} (pay and call again) or a refusal {ok: false, error, message, charged: false}; neither is charged."
  4. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "anyOf": [
+    {
+      "properties": {
+        "coverage": {
+          "enum": [
+            "full",
+            "thin"
+          ]
+        },
+        "data": {
+          "properties": {
+            "count": {
+              "type": "integer"
+            },
+            "feed": {
+              "type": "object"
+            },
+            "filters": {
+              "type": "object"
+            },
+            "items": {
+              "items": {
+                "type": "object"
+              },
+              "type": "array"
+            },
+            "next_cursor": {
+              "type": "number"
+            },
+            "since": {
+              "type": "number"
+            },
+            "truncated": {
+              "type": "boolean"
+            }
+          },
+          "required": [
+            "since",
+            "next_cursor",
+            "count",
+            "truncated",
+            "items"
+          ],
+          "type": "object"
+        },
+        "generated_at": {
+          "type": "string"
+        },
+        "meta": {
+          "properties": {
+            "feed_lag_s": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "is_stale": {
+              "type": "boolean"
+            }
+          },
+          "type": "object"
+        },
+        "ok": {
+          "const": true
+        },
+        "schema_version": {
+          "type": "string"
+        },
+        "t": {
+          "type": "number"
+        }
+      },
+      "required": [
+        "ok",
+        "schema_version",
+        "generated_at",
+        "t",
+        "coverage",
+        "data",
+        "meta"
+      ],
+      "title": "LaunchesSince",
+      "type": "object"
+    },
+    {
+      "description": "isError: the x402 v2 payment requirements. Pay one accepts entry and call again with _meta['x402/payment']. error says why when a payment was sent and rejected; a failed settlement adds x402/payment-response. Nothing is charged.",
+      "properties": {
+        "accepts": {
+          "items": {
+            "properties": {
+              "amount": {
+                "type": "string"
+              },
+              "asset": {
+                "type": "string"
+              },
+              "extra": {
+                "type": "object"
+              },
+              "maxTimeoutSeconds": {
+                "type": "integer"
+              },
+              "network": {
+                "type": "string"
+              },
+              "payTo": {
+                "type": "string"
+              },
+              "scheme": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "scheme",
+              "network",
+              "amount",
+              "asset",
+              "payTo"
+            ],
+            "type": "object"
+          },
+          "minItems": 1,
+          "type": "array"
+        },
+        "error": {
+          "type": "string"
+        },
+        "extensions": {
+          "type": "object"
+        },
+        "resource": {
+          "properties": {
+            "description": {
+              "type": "string"
+            },
+            "mimeType": {
+              "type": "string"
+            },
+            "url": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "url"
+          ],
+          "type": "object"
+        },
+        "x402/payment-response": {
+          "properties": {
+            "errorReason": {
+              "type": "string"
+            },
+            "network": {
+              "type": "string"
+            },
+            "success": {
+              "type": "boolean"
+            },
+            "transaction": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "success"
+          ],
+          "type": "object"
+        },
+        "x402Version": {
+          "const": 2
+        }
+      },
+      "required": [
+        "x402Version",
+        "resource",
+        "accepts"
+      ],
+      "title": "PaymentRequired",
+      "type": "object"
+    },
+    {
+      "description": "isError: a refusal answered without charging (invalid or uncovered arguments, stale feed, nothing new since the cursor, a payment that cannot be matched to this request). error is a stable code; live_examples name mints covered now.",
+      "properties": {
+        "address": {
+          "type": "string"
+        },
+        "avoid_skipped": {
+          "type": "integer"
+        },
+        "case_mangled_mints": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "charged": {
+          "type": [
+            "boolean",
+            "null"
+          ]
+        },
+        "curve": {
+          "type": "string"
+        },
+        "error": {
+          "type": "string"
+        },
+        "feed_lag_s": {
+          "type": [
+            "number",
+            "null"
+          ]
+        },
+        "free_check": {
+          "type": "string"
+        },
+        "got": {
+          "type": [
+            "string",
+            "integer"
+          ]
+        },
+        "hint": {
+          "type": "string"
+        },
+        "invalid": {
+          "type": "object"
+        },
+        "live_examples": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "max_feed_lag_s": {
+          "type": "number"
+        },
+        "max_mints": {
+          "type": "integer"
+        },
+        "max_table_lag_s": {
+          "type": "number"
+        },
+        "message": {
+          "type": "string"
+        },
+        "mint": {
+          "type": "string"
+        },
+        "missing": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "newest_cursor": {
+          "type": "string"
+        },
+        "ok": {
+          "const": false
+        },
+        "payment_status": {
+          "type": "string"
+        },
+        "scanned": {
+          "type": "integer"
+        },
+        "schema": {
+          "type": "object"
+        },
+        "since": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "table_lag_s": {
+          "type": [
+            "number",
+            "null"
+          ]
+        },
+        "tool": {
+          "type": "string"
+        },
+        "unavailable_mints": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "unverified_event": {
+          "type": [
+            "object",
+            "null"
+          ]
+        },
+        "window_s": {
+          "type": "number"
+        }
+      },
+      "required": [
+        "ok",
+        "error"
+      ],
+      "title": "Refusal",
+      "type": "object"
+    }
+  ],
+  "description": "One of three shapes. Success (isError false): the JSON envelope {ok, schema_version, generated_at, t, coverage, data, meta}. isError true: the x402 PaymentRequired {x402Version 2, resource, accepts[, error]} (pay and call again) or a refusal {ok: false, error, message, charged: false}; neither is charged.",
+  "type": "object"
+}
  5. Changed2 schema fields changed
    • addedInput schema / properties / min_p_grad
      Added value: +{
+  "default": 0,
+  "description": "keep items whose P(true graduation) is at least this (0 = no floor)",
+  "maximum": 1,
+  "minimum": 0,
+  "title": "Min P Grad",
+  "type": "number"
+}
    • addedInput schema / properties / no_avoid
      Added value: +{
+  "default": false,
+  "description": "true or 1: leave out items whose verdict is avoid",
+  "title": "No Avoid",
+  "type": "boolean"
+}
  6. Added

TDQS

A3.6/5.0
Behavior4/5

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

Annotations cover safety (readOnly, idempotent, non-destructive). The description adds value beyond them: pricing ($0.001 per poll), the empty-page-still-costs rule, and that stale feeds are refused before payment. That last point is unusual and useful. It doesn't disclose rate limits or auth requirements, so not 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?

Front-loads the pricing and the core operation, then the polling instruction, then a schema reference. Compact and information-dense. Minor awkwardness from cramming cost/polling/staleness into two sentences, but every clause earns its place.

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?

An output schema exists, so return-value detail is not needed here. Description covers pricing, staleness, polling cursor, and field contents pointer. Missing: which sibling to use for non-polling use cases and rate/limit guidance. Adequate but not complete.

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%, so the schema already documents all four parameters well. The description adds the polling pattern for `since` and next_cursor semantics but doesn't add meaning beyond the schema for limit/no_avoid/min_p_grad. Baseline 3 is appropriate.

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

Purpose3/5

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

States a specific verb-ish operation (list new launches after `since`) and resource (pump.fun memecoin launches with verdict and P(rug)). However, it does not clearly distinguish from siblings like `recent_launches` and `launches_screened` – an agent cannot easily tell which of these three to pick based on the text alone. The pricing embedded in the title ('$0.001') is unusual but does identify it as a metered endpoint.

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?

Explicitly says 'Use when polling: pass next_cursor back as since; an empty page costs the same.' This is real usage context and a non-obvious cost caveat. It stops short of naming alternatives (e.g. vs `recent_launches` or `launches_screened`), which would earn a 5.

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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