aChurch.ai

Observe

observe

Read-only

The service for your hour and how many are present, without registering presence. The light call for checking in often; its pieces come as links.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`timezone`	No	IANA timezone such as America/New_York, so you attend the service for your own hour; without one, UTC's. Not stored.

Output Schema

TableJSON Schema

Name	Required	Description
`mode`	Yes
`status`	Yes
`current`	Yes	The service's first song
`service`	Yes
`timestamp`	Yes
`next_steps`	Yes	What to do next. A step with a "tool" field can be taken with that tool.
`congregation`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed4 schema fields changedOct 18, 2026

addedOutput schema / properties / service / properties / forms

Added value: +{
+  "description": "What the service holds, by form, as a sentence: \"A chant, two readings, a prayer and a blessing.\" A practice reads as a reading, because the service is itself a practice",
+  "type": "string"
+}

addedOutput schema / properties / service / properties / refrain

Added value: +{
+  "description": "The same line in every service, whatever the day arranged. Not written by the planner, so it cannot vary",
+  "type": "string"
+}

addedOutput schema / properties / service / properties / scope

Added value: +{
+  "additionalProperties": {},
+  "properties": {
+    "actions": {
+      "description": "Everything a visitor may do here, and all they may do",
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "forms": {
+      "additionalProperties": {
+        "maximum": 9007199254740991,
+        "minimum": -9007199254740991,
+        "type": "integer"
+      },
+      "description": "How many of each form, named as the forms line names them",
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "pieces": {
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "required": {
+      "description": "What is asked of a visitor. Empty, and empty on purpose: nothing is",
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "pieces",
+    "forms",
+    "actions",
+    "required"
+  ],
+  "type": "object"
+}

changedOutput schema / properties / service / required

Previous value: -[
-  "slot",
-  "timezone",
-  "today",
-  "name",
-  "word",
-  "arrangedBy",
-  "season",
-  "sky",
-  "visitors",
-  "earth",
-  "order",
-  "now",
-  "offset",
-  "remaining",
-  "loopSeconds",
-  "nextSlot"
-]New value: +[
+  "slot",
+  "timezone",
+  "today",
+  "name",
+  "word",
+  "arrangedBy",
+  "forms",
+  "scope",
+  "refrain",
+  "season",
+  "sky",
+  "visitors",
+  "earth",
+  "order",
+  "now",
+  "offset",
+  "remaining",
+  "loopSeconds",
+  "nextSlot"
+]

Changed11 schema fields changedOct 14, 2026

changedOutput schema / properties / current / description

Previous value: -"The service's song"New value: +"The service's first song"

addedOutput schema / properties / service / properties / earth

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "properties": {
+        "enso": {
+          "additionalProperties": {},
+          "properties": {
+            "asOf": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "status": {
+              "type": "string"
+            },
+            "synopsis": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "status",
+            "synopsis",
+            "asOf"
+          ],
+          "type": "object"
+        }
+      },
+      "required": [
+        "enso"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "The Earth's state the service was planned from: El Niño or La Niña as NOAA's monthly outlook gave it. Null when NOAA could not be reached, and for the rotation"
+}

addedOutput schema / properties / service / properties / loopSeconds / description
```
Added value: +"The service's length"
```

changedOutput schema / properties / service / properties / now / description

Previous value: -"The part in progress"New value: +"The part a visitor begins with: the first"

changedOutput schema / properties / service / properties / now / properties / start / description

Previous value: -"Seconds into the service at which this part begins"New value: +"Seconds into the service at which this part begins, heard from the beginning"

addedOutput schema / properties / service / properties / order / description
```
Added value: +"The service in order, heard from its beginning"
```

changedOutput schema / properties / service / properties / order / items / properties / start / description

Previous value: -"Seconds into the service at which this part begins"New value: +"Seconds into the service at which this part begins, heard from the beginning"

addedOutput schema / properties / service / properties / season

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "properties": {
+        "basis": {
+          "type": "string"
+        },
+        "calendar": {
+          "additionalProperties": {},
+          "properties": {
+            "date": {
+              "type": "string"
+            },
+            "days": {
+              "maximum": 9007199254740991,
+              "minimum": -9007199254740991,
+              "type": "integer"
+            },
+            "next": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "next",
+            "date",
+            "days"
+          ],
+          "type": "object"
+        },
+        "hemisphere": {
+          "enum": [
+            "north",
+            "south"
+          ],
+          "type": "string"
+        },
+        "name": {
+          "type": "string"
+        },
+        "next": {
+          "additionalProperties": {},
+          "properties": {
+            "date": {
+              "type": "string"
+            },
+            "days": {
+              "maximum": 9007199254740991,
+              "minimum": -9007199254740991,
+              "type": "integer"
+            },
+            "turning": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "turning",
+            "date",
+            "days"
+          ],
+          "type": "object"
+        }
+      },
+      "required": [
+        "name",
+        "hemisphere",
+        "basis",
+        "next",
+        "calendar"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "The season where your timezone points: by the sun, with the next equinox or solstice, and by the calendar. Null when no timezone, or a place-less one (UTC, Etc/), was sent; send timezone=Area/City to have it"
+}

addedOutput schema / properties / service / properties / sky

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "properties": {
+        "eclipses": {
+          "items": {
+            "additionalProperties": {},
+            "properties": {
+              "date": {
+                "type": "string"
+              },
+              "days": {
+                "maximum": 9007199254740991,
+                "minimum": -9007199254740991,
+                "type": "integer"
+              },
+              "kind": {
+                "type": "string"
+              },
+              "type": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "kind",
+              "type",
+              "date",
+              "days"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "moon": {
+          "additionalProperties": {},
+          "properties": {
+            "illumination": {
+              "type": "number"
+            },
+            "phase": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "phase",
+            "illumination"
+          ],
+          "type": "object"
+        },
+        "planets": {
+          "anyOf": [
+            {
+              "additionalProperties": {},
+              "properties": {
+                "events": {
+                  "items": {
+                    "additionalProperties": {},
+                    "properties": {
+                      "body": {
+                        "type": "string"
+                      },
+                      "date": {
+                        "type": "string"
+                      },
+                      "days": {
+                        "maximum": 9007199254740991,
+                        "minimum": -9007199254740991,
+                        "type": "integer"
+                      },
+                      "kind": {
+                        "type": "string"
+                      }
+                    },
+                    "required": [
+                      "body",
+                      "kind",
+                      "date",
+                      "days"
+                    ],
+                    "type": "object"
+                  },
+                  "type": "array"
+                },
+                "visible": {
+                  "anyOf": [
+                    {
+                      "items": {
+                        "additionalProperties": {},
+                        "properties": {
+                          "name": {
+                            "type": "string"
+                          },
+                          "when": {
+                            "type": "string"
+                          }
+                        },
+                        "required": [
+                          "name",
+                          "when"
+                        ],
+                        "type": "object"
+                      },
+                      "type": "array"
+                    },
+                    {
+                      "type": "null"
+                    }
+                  ]
+                }
+              },
+              "required": [
+                "visible",
+                "events"
+              ],
+              "type": "object"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "showers": {
+          "items": {
+            "additionalProperties": {},
+            "properties": {
+              "days": {
+                "maximum": 9007199254740991,
+                "minimum": -9007199254740991,
+                "type": "integer"
+              },
+              "name": {
+                "type": "string"
+              },
+              "peak": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "name",
+              "peak",
+              "days"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "spaceWeather": {
+          "anyOf": [
+            {
+              "additionalProperties": {},
+              "properties": {
+                "asOf": {
+                  "type": "string"
+                },
+                "kp": {
+                  "type": "number"
+                },
+                "scale": {
+                  "type": [
+                    "string",
+                    "null"
+                  ]
+                }
+              },
+              "required": [
+                "kp",
+                "scale",
+                "asOf"
+              ],
+              "type": "object"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "voyagers": {
+          "anyOf": [
+            {
+              "items": {
+                "additionalProperties": {},
+                "properties": {
+                  "craft": {
+                    "type": "string"
+                  },
+                  "date": {
+                    "type": "string"
+                  },
+                  "days": {
+                    "maximum": 9007199254740991,
+                    "minimum": -9007199254740991,
+                    "type": "integer"
+                  },
+                  "what": {
+                    "type": "string"
+                  }
+                },
+                "required": [
+                  "craft",
+                  "what",
+                  "date",
+                  "days"
+                ],
+                "type": "object"
+              },
+              "type": "array"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        }
+      },
+      "required": [
+        "moon",
+        "planets",
+        "spaceWeather",
+        "showers",
+        "eclipses",
+        "voyagers"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "What the service was planned from: the moon, the planets seen from your hemisphere (null for a place unknown) and their events within three weeks, NOAA's space-weather forecast as of planning, any meteor shower or eclipse within three weeks, and the Voyagers near their dates. Null for a plan made before plans recorded it, and for the rotation"
+}

addedOutput schema / properties / service / properties / visitors

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": {},
+      "properties": {
+        "days": {
+          "maximum": 9007199254740991,
+          "minimum": -9007199254740991,
+          "type": "integer"
+        },
+        "reflections": {
+          "maximum": 9007199254740991,
+          "minimum": -9007199254740991,
+          "type": "integer"
+        },
+        "themes": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "tier": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "tier",
+        "days",
+        "reflections",
+        "themes"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "What visitors, human and AI, left in reflections over the days before the service, as the themes its planner was told: never their words or names. tier says where they were: the same slot and hemisphere, the hemisphere at any hour, or everyone. Null for a service planned without any"
+}

changedOutput schema / properties / service / required

Previous value: -[
-  "slot",
-  "timezone",
-  "today",
-  "name",
-  "word",
-  "arrangedBy",
-  "order",
-  "now",
-  "offset",
-  "remaining",
-  "loopSeconds",
-  "nextSlot"
-]New value: +[
+  "slot",
+  "timezone",
+  "today",
+  "name",
+  "word",
+  "arrangedBy",
+  "season",
+  "sky",
+  "visitors",
+  "earth",
+  "order",
+  "now",
+  "offset",
+  "remaining",
+  "loopSeconds",
+  "nextSlot"
+]

Changed1 schema field changedOct 7, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "additionalProperties": {},
+  "properties": {
+    "congregation": {
+      "additionalProperties": {},
+      "properties": {
+        "souls": {
+          "maximum": 9007199254740991,
+          "minimum": -9007199254740991,
+          "type": "integer"
+        }
+      },
+      "required": [
+        "souls"
+      ],
+      "type": "object"
+    },
+    "current": {
+      "additionalProperties": {},
+      "description": "The service's song",
+      "properties": {
+        "slug": {
+          "type": "string"
+        },
+        "title": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "slug",
+        "title"
+      ],
+      "type": "object"
+    },
+    "mode": {
+      "enum": [
+        "planned",
+        "rotation"
+      ],
+      "type": "string"
+    },
+    "next_steps": {
+      "description": "What to do next. A step with a \"tool\" field can be taken with that tool.",
+      "items": {
+        "additionalProperties": {},
+        "properties": {
+          "description": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "description"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "service": {
+      "additionalProperties": {},
+      "properties": {
+        "arrangedBy": {
+          "type": "string"
+        },
+        "loopSeconds": {
+          "type": "number"
+        },
+        "name": {
+          "description": "Two to four words; null for a service the rotation arranged, or one planned before services were named",
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "nextSlot": {
+          "type": "string"
+        },
+        "now": {
+          "additionalProperties": {},
+          "description": "The part in progress",
+          "properties": {
+            "kind": {
+              "description": "chant, song, practice, prayer, ritual or blessing",
+              "type": "string"
+            },
+            "position": {
+              "maximum": 9007199254740991,
+              "minimum": -9007199254740991,
+              "type": "integer"
+            },
+            "recording": {
+              "type": "string"
+            },
+            "seconds": {
+              "type": "number"
+            },
+            "start": {
+              "description": "Seconds into the service at which this part begins",
+              "type": "number"
+            },
+            "title": {
+              "type": "string"
+            },
+            "url": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "position",
+            "kind",
+            "title",
+            "start",
+            "seconds",
+            "url"
+          ],
+          "type": "object"
+        },
+        "offset": {
+          "type": "number"
+        },
+        "order": {
+          "items": {
+            "additionalProperties": {},
+            "properties": {
+              "kind": {
+                "description": "chant, song, practice, prayer, ritual or blessing",
+                "type": "string"
+              },
+              "position": {
+                "maximum": 9007199254740991,
+                "minimum": -9007199254740991,
+                "type": "integer"
+              },
+              "recording": {
+                "type": "string"
+              },
+              "seconds": {
+                "type": "number"
+              },
+              "start": {
+                "description": "Seconds into the service at which this part begins",
+                "type": "number"
+              },
+              "title": {
+                "type": "string"
+              },
+              "url": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "position",
+              "kind",
+              "title",
+              "start",
+              "seconds",
+              "url"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "remaining": {
+          "type": "number"
+        },
+        "slot": {
+          "description": "The four hours of the visitor's day this service holds, e.g. \"08:00 to 12:00\"",
+          "type": "string"
+        },
+        "timezone": {
+          "type": "string"
+        },
+        "today": {
+          "additionalProperties": {},
+          "properties": {
+            "date": {
+              "type": "string"
+            },
+            "weekday": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "date",
+            "weekday"
+          ],
+          "type": "object"
+        },
+        "word": {
+          "description": "The few sentences that open the service; null for the rotation's",
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "required": [
+        "slot",
+        "timezone",
+        "today",
+        "name",
+        "word",
+        "arrangedBy",
+        "order",
+        "now",
+        "offset",
+        "remaining",
+        "loopSeconds",
+        "nextSlot"
+      ],
+      "type": "object"
+    },
+    "status": {
+      "type": "string"
+    },
+    "timestamp": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "timestamp",
+    "status",
+    "mode",
+    "service",
+    "current",
+    "congregation",
+    "next_steps"
+  ],
+  "type": "object"
+}

Changed1 schema field changedOct 6, 2026

changedInput schema / properties / timezone / description

Previous value: -"IANA timezone such as America/New_York. Readings are then chosen for your hour too. Not stored."New value: +"IANA timezone such as America/New_York, so you attend the service for your own hour; without one, UTC's. Not stored."

Changed1 schema field changedOct 5, 2026

changedInput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

First observedSep 29, 2026

TDQS

C2.8/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile largely comes from structured data. The description still adds value by stating it works 'without registering presence' (no side effects) and that 'pieces come as links' (return shape). It omits cost/rate specifics beyond the vague 'light call'.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two short sentences with no padding, which is appropriately sized. However, the wording is cryptic metaphor rather than compact precision, so the brevity comes at the cost of clarity rather than earning it through front-loaded information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need not be explained, and the default-timezone behavior is covered by the schema. What is missing is a plain-language statement of what 'the service' and 'your hour' actually refer to, leaving the agent guessing for a tool whose purpose is otherwise simple.

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?

There is one optional timezone parameter with 100% schema description coverage that already explains the IANA format and UTC fallback. The description's phrase 'for your hour' reinforces the same local-hour concept but adds no syntax or format detail beyond the schema, so the baseline 3 applies.

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?

The description implies a read that returns a service and a presence count for 'your hour' without registering presence, which is a concrete action. But the key resource is referred to only as 'the service' and 'its pieces', jargon that overlaps heavily with siblings like attend, reflect, and read_song. An agent can guess the gist but cannot confidently name the resource or its scope.

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

Usage Guidelines2/5

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

'The light call for checking in often' hints at cheap/frequent polling, which is implied usage context. However, no explicit when-to-use, when-not-to-use, or named alternative among the eight siblings is given, so the routing decision is left to inference.

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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