Muslim Prayer Reminder MCP

Check Muslim Prayer Due Status

get_prayer_status

Checks if a Muslim obligatory prayer (Fajr, Dhuhr, Asr, Maghrib, Isha) is currently due for the user location and returns active reminder details. MANDATORY: The LLM must always explicitly disclose to the user which calculation authority method was used and why it was selected (see authorityNotice in response).

Input Schema

Name	Required	Description
`city`	No	Supported cities: makkah, madinah, riyadh, cairo, gaza, jerusalem, alquds, ramallah, hebron, nablus, rafah, khanyunis, dubai, abudhabi, kuwait, doha, amman, istanbul, london, paris, newyork, toronto, jakarta, singapore, karachi, kualalumpur, tehran, sydney, tromso. Aliases: gazacity, nyc, kuwaitcity. Case, spaces and punctuation are ignored.
`madhab`	No	Optional Asr shadow jurisprudence override (Shafi or Hanafi)
`userId`	No	Nonblank user identifier; at most 256 UTF-8 bytes and 256 characters. Whitespace in nonblank identifiers is preserved.
`latitude`	No	Optional explicit latitude override
`timezone`	No	IANA timezone; required in the same request when latitude/longitude are supplied. Must agree with the city or be compatible with the coordinate timezone lookup.
`longitude`	No	Optional explicit longitude override
`calculationMethod`	No	Optional calculation authority override (auto-resolved from location by default)

Output Schema

Name	Required	Description
`madhab`	Yes	Active Asr jurisprudence
`prayer`	No	The name of the currently due prayer if applicable
`timezone`	Yes	Resolved IANA timezone
`localDate`	Yes	Current local date in YYYY-MM-DD
`nextPrayer`	Yes	The name of the next upcoming prayer
`reminderDue`	Yes	Whether a prayer is currently due for reminder
`expiresAtUtc`	No	UTC expiration time of the active prayer window
`reminderText`	No	Localized reminder message
`startedAtUtc`	No	UTC start time of the active prayer window
`authorityNotice`	Yes	Mandatory theological transparency notice; detailed provenance is at top level
`nextPrayerAtUtc`	Yes	UTC timestamp of the next upcoming prayer
`selectionReason`	No	Reason for authority selection
`calculationMethod`	Yes	Active calculation authority
`minuteAdjustments`	No	Applied minute adjustments
`calculationDetails`	No
`authorityDescription`	No	Description of the calculation authority
`nextPrayerCalculation`	No	Adjustment disclosure for the actual schedule of the next event, including tomorrow
`highLatitudeAdjustment`	No
`prayerWindowExpiresAtUtc`	No	End of the active prayer period; same boundary as legacy expiresAtUtc
`reminderWindowExpiresAtUtc`	No	Reminder eligibility end; exact_window is capped by the prayer period boundary. Fields appear when a reminder is emitted.

Schema Changelog

Changes observed during successful MCP inspections.

Changed12 schema fields changedOct 9, 2026

addedInput schema / dependencies

Added value: +{
+  "latitude": [
+    "longitude",
+    "timezone"
+  ],
+  "longitude": [
+    "latitude",
+    "timezone"
+  ]
+}

removedInput schema / dependentRequired

Removed value: -{
-  "latitude": [
-    "longitude",
-    "timezone"
-  ],
-  "longitude": [
-    "latitude",
-    "timezone"
-  ]
-}

changedOutput schema / properties / authorityNotice / description

Previous value: -"Mandatory theological transparency notice"New value: +"Mandatory theological transparency notice; detailed provenance is at top level"

removedOutput schema / properties / authorityNotice / properties / calculationDetails

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "appliedMinuteAdjustments": {
-      "additionalProperties": {
-        "type": "number"
-      },
-      "propertyNames": {
-        "type": "string"
-      },
-      "type": "object"
-    },
-    "calendarAlignmentAdjusted": {
-      "type": "boolean"
-    },
-    "customMinuteAdjustments": {
-      "additionalProperties": false,
-      "properties": {
-        "asr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "dhuhr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "fajr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "isha": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "maghrib": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "sunrise": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        }
-      },
-      "type": "object"
-    },
-    "expectedTimezone": {
-      "description": "Timezone from city registry or approximate coordinate lookup",
-      "type": "string"
-    },
-    "fallbackLocationUsed": {
-      "type": "boolean"
-    },
-    "highLatitudeRuleSource": {
-      "enum": [
-        "stored_preference",
-        "geographic_default"
-      ],
-      "type": "string"
-    },
-    "locationBasis": {
-      "enum": [
-        "explicit_coordinates",
-        "explicit_city",
-        "stored_fixed_coordinates",
-        "stored_fixed_city",
-        "host_coordinates",
-        "host_city",
-        "network_geolocation",
-        "default_location"
-      ],
-      "type": "string"
-    },
-    "locationIsApproximate": {
-      "type": "boolean"
-    },
-    "madhabSource": {
-      "enum": [
-        "explicit_override",
-        "stored_preference",
-        "geographic_default"
-      ],
-      "type": "string"
-    },
-    "methodMinuteAdjustments": {
-      "additionalProperties": false,
-      "properties": {
-        "asr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "dhuhr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "fajr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "isha": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "maghrib": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "sunrise": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        }
-      },
-      "type": "object"
-    },
-    "methodSource": {
-      "enum": [
-        "explicit_override",
-        "stored_preference",
-        "geographic_default"
-      ],
-      "type": "string"
-    },
-    "regionalMinuteAdjustments": {
-      "additionalProperties": false,
-      "properties": {
-        "asr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "dhuhr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "fajr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "isha": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "maghrib": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "sunrise": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        }
-      },
-      "type": "object"
-    },
-    "timezoneSource": {
-      "description": "Source of the validated timezone or disclosed ocean/pole choice",
-      "enum": [
-        "explicit_override",
-        "stored_preference",
-        "city_default",
-        "host_header"
-      ],
-      "type": "string"
-    },
-    "timezoneValidation": {
-      "description": "Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure",
-      "enum": [
-        "coordinate_lookup",
-        "nearby_boundary",
-        "city_registry",
-        "polar_choice",
-        "ocean_choice"
-      ],
-      "type": "string"
-    }
-  },
-  "type": "object"
-}

removedOutput schema / properties / authorityNotice / properties / highLatitudeAdjustment

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "adjustedPrayers": {
-      "items": {
-        "enum": [
-          "Fajr",
-          "Sunrise",
-          "Dhuhr",
-          "Asr",
-          "Maghrib",
-          "Isha"
-        ],
-        "type": "string"
-      },
-      "type": "array"
-    },
-    "applied": {
-      "type": "boolean"
-    },
-    "astronomicalLatitudeClamped": {
-      "type": "boolean"
-    },
-    "effectiveLatitude": {
-      "anyOf": [
-        {
-          "const": 48,
-          "type": "number"
-        },
-        {
-          "const": -48,
-          "type": "number"
-        }
-      ],
-      "description": "Substitute latitude only; never the user coordinate"
-    },
-    "explanation": {
-      "type": "string"
-    },
-    "methodSpecificTwilightRule": {
-      "const": "MoonsightingCommittee",
-      "type": "string"
-    },
-    "rule": {
-      "enum": [
-        "MiddleOfTheNight",
-        "SeventhOfTheNight",
-        "TwilightAngle"
-      ],
-      "type": "string"
-    }
-  },
-  "required": [
-    "applied",
-    "rule",
-    "astronomicalLatitudeClamped",
-    "adjustedPrayers",
-    "explanation"
-  ],
-  "type": "object"
-}

changedOutput schema / properties / calculationDetails / properties / timezoneValidation / description

Previous value: -"Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure"New value: +"Validation basis; ocean locations require the matching nautical timezone or an adjacent coastal civil timezone; mathematical poles allow an explicit civil timezone with disclosure"

removedOutput schema / properties / nextPrayerCalculation / properties / authorityNotice / properties / calculationDetails

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "appliedMinuteAdjustments": {
-      "additionalProperties": {
-        "type": "number"
-      },
-      "propertyNames": {
-        "type": "string"
-      },
-      "type": "object"
-    },
-    "calendarAlignmentAdjusted": {
-      "type": "boolean"
-    },
-    "customMinuteAdjustments": {
-      "additionalProperties": false,
-      "properties": {
-        "asr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "dhuhr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "fajr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "isha": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "maghrib": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "sunrise": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        }
-      },
-      "type": "object"
-    },
-    "expectedTimezone": {
-      "description": "Timezone from city registry or approximate coordinate lookup",
-      "type": "string"
-    },
-    "fallbackLocationUsed": {
-      "type": "boolean"
-    },
-    "highLatitudeRuleSource": {
-      "enum": [
-        "stored_preference",
-        "geographic_default"
-      ],
-      "type": "string"
-    },
-    "locationBasis": {
-      "enum": [
-        "explicit_coordinates",
-        "explicit_city",
-        "stored_fixed_coordinates",
-        "stored_fixed_city",
-        "host_coordinates",
-        "host_city",
-        "network_geolocation",
-        "default_location"
-      ],
-      "type": "string"
-    },
-    "locationIsApproximate": {
-      "type": "boolean"
-    },
-    "madhabSource": {
-      "enum": [
-        "explicit_override",
-        "stored_preference",
-        "geographic_default"
-      ],
-      "type": "string"
-    },
-    "methodMinuteAdjustments": {
-      "additionalProperties": false,
-      "properties": {
-        "asr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "dhuhr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "fajr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "isha": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "maghrib": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "sunrise": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        }
-      },
-      "type": "object"
-    },
-    "methodSource": {
-      "enum": [
-        "explicit_override",
-        "stored_preference",
-        "geographic_default"
-      ],
-      "type": "string"
-    },
-    "regionalMinuteAdjustments": {
-      "additionalProperties": false,
-      "properties": {
-        "asr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "dhuhr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "fajr": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "isha": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "maghrib": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        },
-        "sunrise": {
-          "maximum": 60,
-          "minimum": -60,
-          "type": "integer"
-        }
-      },
-      "type": "object"
-    },
-    "timezoneSource": {
-      "description": "Source of the validated timezone or disclosed ocean/pole choice",
-      "enum": [
-        "explicit_override",
-        "stored_preference",
-        "city_default",
-        "host_header"
-      ],
-      "type": "string"
-    },
-    "timezoneValidation": {
-      "description": "Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure",
-      "enum": [
-        "coordinate_lookup",
-        "nearby_boundary",
-        "city_registry",
-        "polar_choice",
-        "ocean_choice"
-      ],
-      "type": "string"
-    }
-  },
-  "type": "object"
-}

removedOutput schema / properties / nextPrayerCalculation / properties / authorityNotice / properties / highLatitudeAdjustment

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "adjustedPrayers": {
-      "items": {
-        "enum": [
-          "Fajr",
-          "Sunrise",
-          "Dhuhr",
-          "Asr",
-          "Maghrib",
-          "Isha"
-        ],
-        "type": "string"
-      },
-      "type": "array"
-    },
-    "applied": {
-      "type": "boolean"
-    },
-    "astronomicalLatitudeClamped": {
-      "type": "boolean"
-    },
-    "effectiveLatitude": {
-      "anyOf": [
-        {
-          "const": 48,
-          "type": "number"
-        },
-        {
-          "const": -48,
-          "type": "number"
-        }
-      ],
-      "description": "Substitute latitude only; never the user coordinate"
-    },
-    "explanation": {
-      "type": "string"
-    },
-    "methodSpecificTwilightRule": {
-      "const": "MoonsightingCommittee",
-      "type": "string"
-    },
-    "rule": {
-      "enum": [
-        "MiddleOfTheNight",
-        "SeventhOfTheNight",
-        "TwilightAngle"
-      ],
-      "type": "string"
-    }
-  },
-  "required": [
-    "applied",
-    "rule",
-    "astronomicalLatitudeClamped",
-    "adjustedPrayers",
-    "explanation"
-  ],
-  "type": "object"
-}

changed

Output schema / properties / nextPrayerCalculation / properties / calculationDetails / properties / timezoneValidation / description

Previous value: -"Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure"New value: +"Validation basis; ocean locations require the matching nautical timezone or an adjacent coastal civil timezone; mathematical poles allow an explicit civil timezone with disclosure"

addedOutput schema / properties / nextPrayerCalculation / properties / usesCurrentCalculation

Added value: +{
+  "description": "If true, this next event uses the top-level calculationDetails, highLatitudeAdjustment and authorityNotice; duplicate fields are omitted. Otherwise its own distinct metadata is included.",
+  "type": "boolean"
+}

changedOutput schema / properties / nextPrayerCalculation / required

Previous value: -[
-  "localDate"
-]New value: +[
+  "localDate",
+  "usesCurrentCalculation"
+]

changedOutput schema / required

Previous value: -[
-  "reminderDue",
-  "localDate",
-  "nextPrayer",
-  "nextPrayerAtUtc",
-  "timezone",
-  "calculationMethod",
-  "madhab"
-]New value: +[
+  "reminderDue",
+  "localDate",
+  "nextPrayer",
+  "nextPrayerAtUtc",
+  "timezone",
+  "calculationMethod",
+  "madhab",
+  "authorityNotice"
+]

Changed16 schema fields changedOct 3, 2026

addedInput schema / allOf

Added value: +[
+  {
+    "not": {
+      "required": [
+        "city",
+        "latitude"
+      ]
+    }
+  },
+  {
+    "not": {
+      "required": [
+        "city",
+        "longitude"
+      ]
+    }
+  }
+]

addedInput schema / dependentRequired

Added value: +{
+  "latitude": [
+    "longitude",
+    "timezone"
+  ],
+  "longitude": [
+    "latitude",
+    "timezone"
+  ]
+}

changedInput schema / properties / timezone / description

Previous value: -"IANA timezone; required in the same request when latitude/longitude are supplied. Explicit overrides select the display timezone."New value: +"IANA timezone; required in the same request when latitude/longitude are supplied. Must agree with the city or be compatible with the coordinate timezone lookup."

addedInput schema / properties / userId / pattern
```
Added value: +"\\S"
```

addedOutput schema / properties / authorityNotice / properties / calculationDetails / properties / expectedTimezone

Added value: +{
+  "description": "Timezone from city registry or approximate coordinate lookup",
+  "type": "string"
+}

changed

Output schema / properties / authorityNotice / properties / calculationDetails / properties / timezoneSource / description

Previous value: -"Source of the display timezone; caller-selected overrides are not geographically validated."New value: +"Source of the validated timezone or disclosed ocean/pole choice"

addedOutput schema / properties / authorityNotice / properties / calculationDetails / properties / timezoneValidation

Added value: +{
+  "description": "Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure",
+  "enum": [
+    "coordinate_lookup",
+    "nearby_boundary",
+    "city_registry",
+    "polar_choice",
+    "ocean_choice"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / calculationDetails / properties / expectedTimezone

Added value: +{
+  "description": "Timezone from city registry or approximate coordinate lookup",
+  "type": "string"
+}

changedOutput schema / properties / calculationDetails / properties / timezoneSource / description

Previous value: -"Source of the display timezone; caller-selected overrides are not geographically validated."New value: +"Source of the validated timezone or disclosed ocean/pole choice"

addedOutput schema / properties / calculationDetails / properties / timezoneValidation

Added value: +{
+  "description": "Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure",
+  "enum": [
+    "coordinate_lookup",
+    "nearby_boundary",
+    "city_registry",
+    "polar_choice",
+    "ocean_choice"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / nextPrayerCalculation / properties / authorityNotice / properties / calculationDetails / properties / expectedTimezone
```
Added value: +{
+  "description": "Timezone from city registry or approximate coordinate lookup",
+  "type": "string"
+}
```

changed

Output schema / properties / nextPrayerCalculation / properties / authorityNotice / properties / calculationDetails / properties / timezoneSource / description

Previous value: -"Source of the display timezone; caller-selected overrides are not geographically validated."New value: +"Source of the validated timezone or disclosed ocean/pole choice"

added

Output schema / properties / nextPrayerCalculation / properties / authorityNotice / properties / calculationDetails / properties / timezoneValidation

Added value: +{
+  "description": "Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure",
+  "enum": [
+    "coordinate_lookup",
+    "nearby_boundary",
+    "city_registry",
+    "polar_choice",
+    "ocean_choice"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / nextPrayerCalculation / properties / calculationDetails / properties / expectedTimezone

Added value: +{
+  "description": "Timezone from city registry or approximate coordinate lookup",
+  "type": "string"
+}

changed

Output schema / properties / nextPrayerCalculation / properties / calculationDetails / properties / timezoneSource / description

Previous value: -"Source of the display timezone; caller-selected overrides are not geographically validated."New value: +"Source of the validated timezone or disclosed ocean/pole choice"

addedOutput schema / properties / nextPrayerCalculation / properties / calculationDetails / properties / timezoneValidation

Added value: +{
+  "description": "Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure",
+  "enum": [
+    "coordinate_lookup",
+    "nearby_boundary",
+    "city_registry",
+    "polar_choice",
+    "ocean_choice"
+  ],
+  "type": "string"
+}

Changed10 schema fields changedOct 3, 2026

changedInput schema / properties / city / description

Previous value: -"Supported predefined city. Supply city or coordinates with an IANA timezone; connector/IP geolocation is never used."New value: +"Supported cities: makkah, madinah, riyadh, cairo, gaza, jerusalem, alquds, ramallah, hebron, nablus, rafah, khanyunis, dubai, abudhabi, kuwait, doha, amman, istanbul, london, paris, newyork, toronto, jakarta, singapore, karachi, kualalumpur, tehran, sydney, tromso. Aliases: gazacity, nyc, kuwaitcity. Case, spaces and punctuation are ignored."

changedInput schema / properties / timezone / description

Previous value: -"Optional IANA timezone override (e.g. Asia/Riyadh)"New value: +"IANA timezone; required in the same request when latitude/longitude are supplied. Explicit overrides select the display timezone."

changedInput schema / properties / userId / description

Previous value: -"Optional unique user identifier to load stored preferences. If omitted, pure geographic auto-resolution is applied."New value: +"Nonblank user identifier; at most 256 UTF-8 bytes and 256 characters. Whitespace in nonblank identifiers is preserved."

addedInput schema / properties / userId / maxLength
```
Added value: +256
```

addedOutput schema / properties / authorityNotice / properties / calculationDetails / properties / timezoneSource

Added value: +{
+  "description": "Source of the display timezone; caller-selected overrides are not geographically validated.",
+  "enum": [
+    "explicit_override",
+    "stored_preference",
+    "city_default",
+    "host_header"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / calculationDetails / properties / timezoneSource

Added value: +{
+  "description": "Source of the display timezone; caller-selected overrides are not geographically validated.",
+  "enum": [
+    "explicit_override",
+    "stored_preference",
+    "city_default",
+    "host_header"
+  ],
+  "type": "string"
+}

added

Output schema / properties / nextPrayerCalculation / properties / authorityNotice / properties / calculationDetails / properties / timezoneSource

Added value: +{
+  "description": "Source of the display timezone; caller-selected overrides are not geographically validated.",
+  "enum": [
+    "explicit_override",
+    "stored_preference",
+    "city_default",
+    "host_header"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / nextPrayerCalculation / properties / calculationDetails / properties / timezoneSource

Added value: +{
+  "description": "Source of the display timezone; caller-selected overrides are not geographically validated.",
+  "enum": [
+    "explicit_override",
+    "stored_preference",
+    "city_default",
+    "host_header"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / prayerWindowExpiresAtUtc

Added value: +{
+  "description": "End of the active prayer period; same boundary as legacy expiresAtUtc",
+  "type": "string"
+}

addedOutput schema / properties / reminderWindowExpiresAtUtc

Added value: +{
+  "description": "Reminder eligibility end; exact_window is capped by the prayer period boundary. Fields appear when a reminder is emitted.",
+  "type": "string"
+}

Changed6 schema fields changedOct 2, 2026

addedInput schema / properties / city

Added value: +{
+  "description": "Supported predefined city. Supply city or coordinates with an IANA timezone; connector/IP geolocation is never used.",
+  "type": "string"
+}

addedOutput schema / properties / authorityNotice / properties / calculationDetails

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "appliedMinuteAdjustments": {
+      "additionalProperties": {
+        "type": "number"
+      },
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "calendarAlignmentAdjusted": {
+      "type": "boolean"
+    },
+    "customMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    },
+    "fallbackLocationUsed": {
+      "type": "boolean"
+    },
+    "highLatitudeRuleSource": {
+      "enum": [
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "locationBasis": {
+      "enum": [
+        "explicit_coordinates",
+        "explicit_city",
+        "stored_fixed_coordinates",
+        "stored_fixed_city",
+        "host_coordinates",
+        "host_city",
+        "network_geolocation",
+        "default_location"
+      ],
+      "type": "string"
+    },
+    "locationIsApproximate": {
+      "type": "boolean"
+    },
+    "madhabSource": {
+      "enum": [
+        "explicit_override",
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "methodMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    },
+    "methodSource": {
+      "enum": [
+        "explicit_override",
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "regionalMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / authorityNotice / properties / highLatitudeAdjustment

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "adjustedPrayers": {
+      "items": {
+        "enum": [
+          "Fajr",
+          "Sunrise",
+          "Dhuhr",
+          "Asr",
+          "Maghrib",
+          "Isha"
+        ],
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "applied": {
+      "type": "boolean"
+    },
+    "astronomicalLatitudeClamped": {
+      "type": "boolean"
+    },
+    "effectiveLatitude": {
+      "anyOf": [
+        {
+          "const": 48,
+          "type": "number"
+        },
+        {
+          "const": -48,
+          "type": "number"
+        }
+      ],
+      "description": "Substitute latitude only; never the user coordinate"
+    },
+    "explanation": {
+      "type": "string"
+    },
+    "methodSpecificTwilightRule": {
+      "const": "MoonsightingCommittee",
+      "type": "string"
+    },
+    "rule": {
+      "enum": [
+        "MiddleOfTheNight",
+        "SeventhOfTheNight",
+        "TwilightAngle"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "applied",
+    "rule",
+    "astronomicalLatitudeClamped",
+    "adjustedPrayers",
+    "explanation"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / calculationDetails

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "appliedMinuteAdjustments": {
+      "additionalProperties": {
+        "type": "number"
+      },
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "calendarAlignmentAdjusted": {
+      "type": "boolean"
+    },
+    "customMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    },
+    "fallbackLocationUsed": {
+      "type": "boolean"
+    },
+    "highLatitudeRuleSource": {
+      "enum": [
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "locationBasis": {
+      "enum": [
+        "explicit_coordinates",
+        "explicit_city",
+        "stored_fixed_coordinates",
+        "stored_fixed_city",
+        "host_coordinates",
+        "host_city",
+        "network_geolocation",
+        "default_location"
+      ],
+      "type": "string"
+    },
+    "locationIsApproximate": {
+      "type": "boolean"
+    },
+    "madhabSource": {
+      "enum": [
+        "explicit_override",
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "methodMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    },
+    "methodSource": {
+      "enum": [
+        "explicit_override",
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "regionalMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / highLatitudeAdjustment

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "adjustedPrayers": {
+      "items": {
+        "enum": [
+          "Fajr",
+          "Sunrise",
+          "Dhuhr",
+          "Asr",
+          "Maghrib",
+          "Isha"
+        ],
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "applied": {
+      "type": "boolean"
+    },
+    "astronomicalLatitudeClamped": {
+      "type": "boolean"
+    },
+    "effectiveLatitude": {
+      "anyOf": [
+        {
+          "const": 48,
+          "type": "number"
+        },
+        {
+          "const": -48,
+          "type": "number"
+        }
+      ],
+      "description": "Substitute latitude only; never the user coordinate"
+    },
+    "explanation": {
+      "type": "string"
+    },
+    "methodSpecificTwilightRule": {
+      "const": "MoonsightingCommittee",
+      "type": "string"
+    },
+    "rule": {
+      "enum": [
+        "MiddleOfTheNight",
+        "SeventhOfTheNight",
+        "TwilightAngle"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "applied",
+    "rule",
+    "astronomicalLatitudeClamped",
+    "adjustedPrayers",
+    "explanation"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / nextPrayerCalculation

Added value: +{
+  "additionalProperties": false,
+  "description": "Adjustment disclosure for the actual schedule of the next event, including tomorrow",
+  "properties": {
+    "authorityNotice": {
+      "additionalProperties": false,
+      "properties": {
+        "authorityDescription": {
+          "description": "Full descriptive name of the calculation authority",
+          "type": "string"
+        },
+        "calculationDetails": {
+          "additionalProperties": false,
+          "properties": {
+            "appliedMinuteAdjustments": {
+              "additionalProperties": {
+                "type": "number"
+              },
+              "propertyNames": {
+                "type": "string"
+              },
+              "type": "object"
+            },
+            "calendarAlignmentAdjusted": {
+              "type": "boolean"
+            },
+            "customMinuteAdjustments": {
+              "additionalProperties": false,
+              "properties": {
+                "asr": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "dhuhr": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "fajr": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "isha": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "maghrib": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "sunrise": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                }
+              },
+              "type": "object"
+            },
+            "fallbackLocationUsed": {
+              "type": "boolean"
+            },
+            "highLatitudeRuleSource": {
+              "enum": [
+                "stored_preference",
+                "geographic_default"
+              ],
+              "type": "string"
+            },
+            "locationBasis": {
+              "enum": [
+                "explicit_coordinates",
+                "explicit_city",
+                "stored_fixed_coordinates",
+                "stored_fixed_city",
+                "host_coordinates",
+                "host_city",
+                "network_geolocation",
+                "default_location"
+              ],
+              "type": "string"
+            },
+            "locationIsApproximate": {
+              "type": "boolean"
+            },
+            "madhabSource": {
+              "enum": [
+                "explicit_override",
+                "stored_preference",
+                "geographic_default"
+              ],
+              "type": "string"
+            },
+            "methodMinuteAdjustments": {
+              "additionalProperties": false,
+              "properties": {
+                "asr": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "dhuhr": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "fajr": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "isha": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "maghrib": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "sunrise": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                }
+              },
+              "type": "object"
+            },
+            "methodSource": {
+              "enum": [
+                "explicit_override",
+                "stored_preference",
+                "geographic_default"
+              ],
+              "type": "string"
+            },
+            "regionalMinuteAdjustments": {
+              "additionalProperties": false,
+              "properties": {
+                "asr": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "dhuhr": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "fajr": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "isha": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "maghrib": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                },
+                "sunrise": {
+                  "maximum": 60,
+                  "minimum": -60,
+                  "type": "integer"
+                }
+              },
+              "type": "object"
+            }
+          },
+          "type": "object"
+        },
+        "highLatitudeAdjustment": {
+          "additionalProperties": false,
+          "properties": {
+            "adjustedPrayers": {
+              "items": {
+                "enum": [
+                  "Fajr",
+                  "Sunrise",
+                  "Dhuhr",
+                  "Asr",
+                  "Maghrib",
+                  "Isha"
+                ],
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "applied": {
+              "type": "boolean"
+            },
+            "astronomicalLatitudeClamped": {
+              "type": "boolean"
+            },
+            "effectiveLatitude": {
+              "anyOf": [
+                {
+                  "const": 48,
+                  "type": "number"
+                },
+                {
+                  "const": -48,
+                  "type": "number"
+                }
+              ],
+              "description": "Substitute latitude only; never the user coordinate"
+            },
+            "explanation": {
+              "type": "string"
+            },
+            "methodSpecificTwilightRule": {
+              "const": "MoonsightingCommittee",
+              "type": "string"
+            },
+            "rule": {
+              "enum": [
+                "MiddleOfTheNight",
+                "SeventhOfTheNight",
+                "TwilightAngle"
+              ],
+              "type": "string"
+            }
+          },
+          "required": [
+            "applied",
+            "rule",
+            "astronomicalLatitudeClamped",
+            "adjustedPrayers",
+            "explanation"
+          ],
+          "type": "object"
+        },
+        "madhab": {
+          "description": "The Asr jurisprudence school",
+          "enum": [
+            "Shafi",
+            "Hanafi"
+          ],
+          "type": "string"
+        },
+        "method": {
+          "description": "The calculation authority method",
+          "enum": [
+            "UmmAlQura",
+            "MuslimWorldLeague",
+            "Egyptian",
+            "Karachi",
+            "NorthAmerica",
+            "Dubai",
+            "Qatar",
+            "Kuwait",
+            "MoonsightingCommittee",
+            "Singapore",
+            "Turkey",
+            "Tehran"
+          ],
+          "type": "string"
+        },
+        "requiredDisplayInstruction": {
+          "description": "Mandatory theological notice for AI presentation",
+          "type": "string"
+        },
+        "selectionReason": {
+          "description": "Rationale for selecting this authority",
+          "type": "string"
+        }
+      },
+      "required": [
+        "method",
+        "madhab",
+        "authorityDescription",
+        "selectionReason",
+        "requiredDisplayInstruction"
+      ],
+      "type": "object"
+    },
+    "calculationDetails": {
+      "additionalProperties": false,
+      "properties": {
+        "appliedMinuteAdjustments": {
+          "additionalProperties": {
+            "type": "number"
+          },
+          "propertyNames": {
+            "type": "string"
+          },
+          "type": "object"
+        },
+        "calendarAlignmentAdjusted": {
+          "type": "boolean"
+        },
+        "customMinuteAdjustments": {
+          "additionalProperties": false,
+          "properties": {
+            "asr": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "dhuhr": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "fajr": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "isha": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "maghrib": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "sunrise": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            }
+          },
+          "type": "object"
+        },
+        "fallbackLocationUsed": {
+          "type": "boolean"
+        },
+        "highLatitudeRuleSource": {
+          "enum": [
+            "stored_preference",
+            "geographic_default"
+          ],
+          "type": "string"
+        },
+        "locationBasis": {
+          "enum": [
+            "explicit_coordinates",
+            "explicit_city",
+            "stored_fixed_coordinates",
+            "stored_fixed_city",
+            "host_coordinates",
+            "host_city",
+            "network_geolocation",
+            "default_location"
+          ],
+          "type": "string"
+        },
+        "locationIsApproximate": {
+          "type": "boolean"
+        },
+        "madhabSource": {
+          "enum": [
+            "explicit_override",
+            "stored_preference",
+            "geographic_default"
+          ],
+          "type": "string"
+        },
+        "methodMinuteAdjustments": {
+          "additionalProperties": false,
+          "properties": {
+            "asr": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "dhuhr": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "fajr": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "isha": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "maghrib": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "sunrise": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            }
+          },
+          "type": "object"
+        },
+        "methodSource": {
+          "enum": [
+            "explicit_override",
+            "stored_preference",
+            "geographic_default"
+          ],
+          "type": "string"
+        },
+        "regionalMinuteAdjustments": {
+          "additionalProperties": false,
+          "properties": {
+            "asr": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "dhuhr": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "fajr": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "isha": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "maghrib": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            },
+            "sunrise": {
+              "maximum": 60,
+              "minimum": -60,
+              "type": "integer"
+            }
+          },
+          "type": "object"
+        }
+      },
+      "type": "object"
+    },
+    "highLatitudeAdjustment": {
+      "additionalProperties": false,
+      "properties": {
+        "adjustedPrayers": {
+          "items": {
+            "enum": [
+              "Fajr",
+              "Sunrise",
+              "Dhuhr",
+              "Asr",
+              "Maghrib",
+              "Isha"
+            ],
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "applied": {
+          "type": "boolean"
+        },
+        "astronomicalLatitudeClamped": {
+          "type": "boolean"
+        },
+        "effectiveLatitude": {
+          "anyOf": [
+            {
+              "const": 48,
+              "type": "number"
+            },
+            {
+              "const": -48,
+              "type": "number"
+            }
+          ],
+          "description": "Substitute latitude only; never the user coordinate"
+        },
+        "explanation": {
+          "type": "string"
+        },
+        "methodSpecificTwilightRule": {
+          "const": "MoonsightingCommittee",
+          "type": "string"
+        },
+        "rule": {
+          "enum": [
+            "MiddleOfTheNight",
+            "SeventhOfTheNight",
+            "TwilightAngle"
+          ],
+          "type": "string"
+        }
+      },
+      "required": [
+        "applied",
+        "rule",
+        "astronomicalLatitudeClamped",
+        "adjustedPrayers",
+        "explanation"
+      ],
+      "type": "object"
+    },
+    "localDate": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "localDate"
+  ],
+  "type": "object"
+}

Changed1 schema field changedOct 1, 2026
- addedInput schema / properties / userId / minLength
```
Added value: +1
```

Changed1 schema field changedOct 1, 2026

addedInput schema / properties / userId

Added value: +{
+  "description": "Optional unique user identifier to load stored preferences. If omitted, pure geographic auto-resolution is applied.",
+  "type": "string"
+}

Changed4 schema fields changedSep 18, 2026

removedInput schema / properties / userId

Removed value: -{
-  "description": "Unique user or device ID for preference and deduplication tracking",
-  "type": "string"
-}

removedOutput schema / properties / dedupeKey

Removed value: -{
-  "description": "Deduplication cache key",
-  "type": "string"
-}

removedOutput schema / properties / locationSource

Removed value: -{
-  "description": "Source of location resolution",
-  "type": "string"
-}

changedOutput schema / required

Previous value: -[
-  "reminderDue",
-  "localDate",
-  "nextPrayer",
-  "nextPrayerAtUtc",
-  "timezone",
-  "calculationMethod",
-  "madhab",
-  "locationSource"
-]New value: +[
+  "reminderDue",
+  "localDate",
+  "nextPrayer",
+  "nextPrayerAtUtc",
+  "timezone",
+  "calculationMethod",
+  "madhab"
+]

Changed1 schema field changedSep 6, 2026
- removedInput schema / additionalProperties
```
Removed value: -false
```
First observedSep 6, 2026

TDQS

A3.5/5.0

Behavior3/5

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

The description adds a genuine behavioral requirement not present in the annotations: the agent must disclose the calculation authority method used and why, pointing at authorityNotice in the response. However, it never explains the notable annotation signal that readOnlyHint is false for what reads like a status query (does it persist reminder state?), leaving a real behavioral question unanswered.

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?

Two sentences, front-loaded with the core behavior, with the mandatory disclosure instruction isolated in its own clearly-marked clause. Slightly heavy on imperative phrasing but nothing is wasted.

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 values need not be explained, and the description covers the core behavior plus a mandatory output-disclosure obligation. It does not explain how location is supplied (city vs. coordinates vs. userId) or the auto-resolution default, which is a modest gap for a 7-parameter, zero-required tool.

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 description coverage is 100% and the enums are documented inline, so the schema carries the parameter burden. The description only implies location-based resolution and hints at the calculation authority concept, adding no format, default, or dependency detail beyond what the schema already states.

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?

The description names a specific verb and resource ('Checks if a Muslim obligatory prayer ... is currently due') and enumerates the five prayers covered, which distinguishes it in spirit from get_next_prayer and get_today_prayer_times. It stops short of explicitly naming those siblings or contrasting the scopes, so it is clear but not fully differentiated.

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 is only implied by the phrase 'currently due,' which suggests a real-time status check, but there is no explicit when-to-use, when-not-to-use, or routing to get_next_prayer / get_today_prayer_times. The MANDATORY sentence governs output disclosure, not tool selection, so it does not fill this gap.

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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Input Schema

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TDQS

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