Peter confessed Jesus was the Christ. Jesus responded graciously in (ESV) Mat 16:
ἔσται (estai)
Verb - Future Indicative Middle - 3rd Person Singular
bound
δεδεμένον (dedemenon)
Verb - Perfect Participle Middle or Passive - Nominative Neuter Singular
The grammar shows a future perfect construct.
What kind of power was given to Peter in the context of the church?
It was the power to articulate the will in heaven concerning the church.
Berean Literal Bible:
Jesus repeated that binding and loosing language in Matthew 18:18
Same thing. It was the power to articulate the will in heaven concerning the church.
An example of this authority happened at the Jerusalem Council in Acts 15:
i.e., the coming churchI will give you the keys of the kingdom of heaven,
shall beand whatever you [Peter, singular] bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven.
ἔσται (estai)
Verb - Future Indicative Middle - 3rd Person Singular
bound
δεδεμένον (dedemenon)
Verb - Perfect Participle Middle or Passive - Nominative Neuter Singular
The grammar shows a future perfect construct.
What kind of power was given to Peter in the context of the church?
It was the power to articulate the will in heaven concerning the church.
Berean Literal Bible:
Amplified Bible:I will give to you the keys of the kingdom of the heavens, and whatever you might bind on the earth shall have been bound in the heavens, and whatever you might loose on the earth shall have been loosed in the heavens."
After Jesus' resurrection, the church started to grow. An example of this authority happened in Acts 10:I will give you the keys (authority) of the kingdom of heaven; and whatever you bind [forbid, declare to be improper and unlawful] on earth will have [already] been bound in heaven, and whatever you loose [permit, declare lawful] on earth will have [already] been loosed in heaven.”
The initiative came from above, not from Peter.10 And he [Peter] became hungry and wanted something to eat, but while they were preparing it, he fell into a trance 11 and saw the heavens opened and something like a great sheet descending, being let down by its four corners upon the earth.
Peter was empowered to declare foods and gentiles were clean.12 In it were all kinds of animals and reptiles and birds of the air. 13And there came a voice to him: “Rise, Peter; kill and eat.” 14But Peter said, “By no means, Lord; for I have never eaten anything that is common or unclean.” 15And the voice came to him again a second time, “What God has made clean, do not call common.”
Jesus repeated that binding and loosing language in Matthew 18:18
On this occasion, what kind of power was given to the apostles?Truly, I say to you [apostles, plural], whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven.
Same thing. It was the power to articulate the will in heaven concerning the church.
An example of this authority happened at the Jerusalem Council in Acts 15:
In this case, the initiative seems to come from both the apostles and the Holy Spirit. This is reflected in the ambiguity of the future perfect tense. It is also the concept of Co-Reality where both the vertical and the horizontal realities play a part together.28 It seemed good to the Holy Spirit and to us not to burden you with anything beyond the following requirements: 29 You are to abstain from food sacrificed to idols, from blood, from the meat of strangled animals and from sexual immorality. You will do well to avoid these things.